When choosing glasses, the material of the frame directly affects the comfort and durability of wearing. Currently, pure titanium and titanium alloys are the two mainstream high-end materials in the market. Because of their high purity and smooth texture, pure titanium frames are highly favored, but their welding process is complex, and their prices are relatively higher. β-titanium alloy reduces the elastic modulus by incorporating elements vanadium and aluminum into titanium. It effectively enhances flexibility while optimizing processing performance, making it more cost-effective. So, in which aspects do the excellent characteristics of titanium alloy frames manifest?
Lightweight: Reducing the burden on the bridge of the nose
Traditional metal eyeglass frames are mostly made of stainless steel or Monel alloy. Its self-weight typically ranges from 20 to 30 grams. When paired with lenses, the total weight often exceeds 40 grams. If it presses on the bridge of the nose for a long time, it can easily cause indentations and even lead to skin discomfort. In contrast, the pure frame weight of titanium alloy eyeglass frames can be as low as 6 to 8 grams; even when including lenses, the overall weight can be controlled within 15 to 25 grams. The weight is evenly distributed through the nose pads and the temples of the glasses, significantly reducing the pressure on the local area. Some designs with no screws or welds, and an integrated structure, further reduce the structural weight. The lightweight eyeglass frames remain stable during exercise, and even make some users forget to take off their glasses frequently.
Flexibility: Enhancing Daily Durability
Glasses are prone to deformation by accidental collisions or storage compression during daily use. Traditional frame materials are often difficult to recover completely after deformation, and repeated adjustments can accelerate metal fatigue, eventually leading to fracture. Titanium alloy eyeglass frames, with their lower elastic modulus, have excellent deformation recovery capabilities. After being bent to a certain extent, it can quickly return to its original shape. This characteristic makes unexpected deformation reversible. Besides, the non-screw elastic hinge design is gradually becoming more popular. It utilizes the material's own rebound force to achieve the opening and closing of the frame legs, avoiding the problems of traditional screws loosening, rusting, or falling off, and extending the lifespan of the frame.
Corrosion resistance: Resistant to daily contact
Glasses come into prolonged contact with skin oils, sweat, cosmetics, and humid environments. Ordinary metal materials may undergo oxidation, discoloration, or pitting corrosion. Some nickel alloys may even cause skin allergies. The corrosion resistance of titanium comes from its self-healing oxide film surface. Even if there are minor scratches on the surface, the oxide film can quickly regenerate. Whether it suffers from sweat, the high-salt seaside, or chlorine water in swimming pools, titanium alloys can maintain stable chemical properties. Moreover, titanium material has good biocompatibility. People allergic to nickel can choose titanium alloy frames to avoid redness, itching, and other contact dermatitis reactions at the back of the ear or the bridge of the nose.