1. Classification and Core Features of Mainstream Eyeglass Frame Materials
1.1 Acetate Frames
Core Composition: Mainly made of cellulose acetate, with additives such as plasticizers and stabilizers. It is shaped by heating. Some high-end models incorporate natural resins or plant fibers to enhance texture.
Physical Properties:
Fine Texture: It has a soft surface luster, smooth touch, high color saturation, and rich textures. It can present natural patterns like wood grain and marble grain, exuding a strong sense of fashion.
Strong Plasticity: The frame’s curvature can be adjusted after heating, allowing it to fit different face shapes better. It is suitable for installing various lenses, such as myopia and hyperopia lenses.
Moderate Weight: With a density of approximately 1.2-1.4g/cm³, a single pair usually weighs 20-35g. It offers better wearing comfort than some metal frames, but may still cause slight pressure on the bridge of the nose when worn for a long time.
Suitable Scenarios and Crowds: Ideal for young people pursuing fashion and individuality, daily commuters, and those allergic to metals. Not recommended for sports, as the material is relatively brittle and prone to breaking upon impact.
1.2 Metal Frames
Core Composition: Common materials include pure titanium, titanium alloy, stainless steel, and nickel alloy. Among them, pure titanium and titanium alloy are high-end mainstream choices due to their lightweight and corrosion-resistant properties, while nickel alloy is often used in affordable models.
Physical Properties:
Lightweight Advantage: Pure titanium frames have a density of only 4.5g/cm³, and a single pair can weigh as little as 10-15g. Wearing them for a long time will not cause pressure on the bridge of the nose, making them suitable for people with high myopia (to balance the weight when matching with thick lenses).
Strength and Corrosion Resistance: Titanium alloy is 1.2-1.5 times stronger than pure titanium and resistant to acid and alkali corrosion. It is not easy to rust when in long-term contact with sweat. Stainless steel frames have high strength but are slightly heavier. Nickel alloy may cause skin allergies in some people.
Simple Style: Mostly designed with thin frames or half frames, featuring smooth lines. Suitable for business people, students, and those who prefer a simple and neat style.
Suitable Scenarios and Crowds: The first choice for business offices and daily study. People with high myopia and those sensitive to weight should prioritize pure titanium or titanium alloy models. Those with allergic constitutions should avoid nickel alloy materials.
1.3 TR90 Frames
Core Composition: A memory polymer material, mainly composed of a blend of polycarbonate and elastomer. It does not contain harmful substances such as bisphenol A, ensuring high safety.
Physical Properties:
Ultra-light and Shatter-resistant: With a density of only 1.1g/cm³, a single pair usually weighs 8-12g, making it one of the lightest materials among mainstream frames. Its impact strength is more than 3 times that of acetate. It can quickly rebound after being bent and is not easy to break, making it suitable for sports scenarios.
Strong Temperature Resistance: It maintains stable performance in environments ranging from -30℃ to 120℃. It will not deform or crack due to temperature changes, and can remain in good condition even under summer exposure or winter low temperatures.
Skin-friendly and Comfortable: The surface is smooth without edges and corners. The temples have good elasticity, so they will not pinch the head or ears. It does not react chemically with the skin, making it suitable for children, sports enthusiasts, and long-term wearers.
Suitable Scenarios and Crowds: The first choice for children’s glasses and sports glasses. Also suitable for people who wear glasses frequently in daily life. However, due to their mostly casual and sporty styles, they are less suitable for business occasions.
1.4 Natural Material Frames
Core Composition: Mainly include horn, tortoiseshell (artificial imitations, as natural tortoiseshell trading is prohibited), and wood. They are made through manual cutting and polishing, featuring complex craftsmanship and unique textures.
Physical Properties:
Unique Texture: Each frame has a one-of-a-kind texture. Horn frames are smooth and glossy, while wooden frames have natural wood grains, combining practicality and collection value.
Weight and Comfort: Horn frames have a density of approximately 1.3-1.5g/cm³, with a weight similar to acetate frames. The weight of wooden frames varies greatly depending on the type of wood (pine is about 0.5g/cm³, and walnut is about 0.8g/cm³). Lightweight wood is more comfortable to wear but has poor moisture resistance.
High Craftsmanship Requirements: They need to be handmade, with a long processing cycle. They are expensive and difficult to maintain (avoid contact with water and exposure to the sun, and apply special care oil regularly).
Suitable Scenarios and Crowds: Suitable for people pursuing high-end customization and traditional culture. They are mostly used for daily leisure or special occasions. Not recommended for humid environments or sports scenarios.
2. Horizontal Comparison from Five Dimensions (Data Presentation)
Comparison Dimension
Acetate Frames
Metal Frames (Pure Titanium/Titanium Alloy)
TR90 Frames
Natural Material Frames (Horn/Solid Wood)
Weight (Per Pair)
20-35g
10-15g
8-12g
15-40g (Varies by Material)
Impact Resistance
Moderate (Easy to Break)
Good (Slight Deformation Repairable)
Excellent (Bends and Rebounds)
Poor (Easy to Crack)
Corrosion Resistance
Good (Resistant to Sweat, Acid and Alkali)
Excellent (Titanium Alloy Rust-resistant)
Excellent (No Reaction with Sweat)
Poor (Horn Fear of Moisture, Wood Prone to Rot)
Suitable Crowds
Fashion Enthusiasts, Allergy Sufferers
Business People, High Myopia Patients
Children, Sports Enthusiasts
People with High-end Customization Needs, Culture Enthusiasts
Price Range (Per Pair)
$21−112
$42−281
$11−42
$112−702
Maintenance Difficulty
Moderate (Avoid High Temperature, Impact)
Simple (Clean Hinges Regularly)
Simple (Washable with Water)
Difficult (Need Moisture-proof, Apply Care Oil)
3. Targeted Selection Suggestions
3.1 Selection by Usage Scenario
Daily Commuting/Business Office: Prioritize metal frames (pure titanium/titanium alloy). The thin-frame design looks neat when matched with formal or casual clothes, and its lightweight feature is suitable for long-term wear. If you pursue a sense of fashion, you can choose half-frame acetate models to balance business and individuality.
Sports/Fitness/Outdoor Scenarios: TR90 frames are a must. Their impact-resistant and shatter-resistant properties can cope with intense sports such as running and basketball. Some models are also equipped with anti-slip nose pads and temples to prevent slipping during sports. Avoid acetate or natural material frames to prevent damage from impact.
Children’s Wear: TR90 frames are the first choice. The ultra-light material will not put pressure on children’s nose bridges and ears, and their shatter-resistant feature is suitable for children’s active nature. At the same time, choose styles with rounded frame edges to avoid scratches from sharp parts.
Special Occasions/Collection Needs: Natural material frames (such as artificial tortoiseshell and walnut) are more suitable. Their unique textures and handmade craftsmanship can highlight taste, making them suitable for matching with casual clothes to attend parties or for collection. However, pay attention to daily maintenance and avoid moisture and exposure to the sun.
3.2 Selection by Personal Needs
People with High Myopia: Metal frames (pure titanium/titanium alloy) are more suitable. Their lightweight feature can balance the weight of thick lenses and reduce the burden on the nose bridge. It is recommended to choose full-frame styles, which can better fix thick lenses and prevent lens falling.
Allergy Sufferers: Prioritize acetate frames or pure titanium metal frames. Acetate materials do not contain metal components, and pure titanium frames will not cause allergic reactions. Avoid nickel alloy, stainless steel, and other metal materials that may cause allergies. When purchasing, check whether the product is marked with “nickel-free certification”.
People with Limited Budgets: TR90 frames have the highest cost-effectiveness. The price range of 11−42 can meet daily use needs. They are durable and have a service life of 2-3 years. If you pursue a variety of styles, you can also choose basic acetate frames ranging from 21−42.
People Pursuing Fashion and Individuality: Acetate frames have the most abundant styles and a variety of color and texture choices. You can match different styles (such as retro round frames and square large frames) according to clothing styles. Some high-end acetate frames are also spliced with metal, combining fashion and texture.
3.3 Pitfall Avoidance Guide
Beware of “Low-Price Pure Titanium Frames”: Some frames marked as “pure titanium” on the market are actually made of titanium alloy or nickel alloy. They are heavier than pure titanium and may cause allergies. When purchasing, you can make a preliminary judgment through the “magnet test” (pure titanium is not magnetic, titanium alloy is slightly magnetic, and nickel alloy is easily magnetic). At the same time, check whether the product has a “pure titanium certification mark” (such as Ti-Pure).
Distinguish Inferior Acetate Frames: Inferior acetate frames are mostly made of recycled plastics, with rough surfaces, easy fading, and may release harmful substances. High-quality acetate frames have smooth surfaces, clear textures, slight elasticity when bent, and no pungent odor.
Avoid Blindly Choosing Natural Material Frames: Natural material frames (such as horn and wood) are difficult to maintain. They are easy to deform and mildew in humid environments and are expensive. If you wear glasses frequently in daily life, it is recommended to prioritize acetate or TR90 frames. Natural material frames can be used as spares or for collection.
Pay Attention to Frame Size Adaptation: When purchasing, pay attention to the frame size (such as frame width and nose bridge spacing) to avoid discomfort caused by too large or too small sizes. Generally, the frame width should be similar to the face width, and the nose bridge spacing should match the nose width to ensure that the optical center of the lens is aligned with the pupil center, avoiding problems such as blurred vision and eye fatigue.
