Titanium in the eyewear industry has been blown away, pure titanium frames have become the treasure of town shops in ordinary eyeglasses stores, as long as you say you want to buy a good point of the frame, the boss will recommend this to you. Titanium has characteristics of light weight, high specific strength (strength and density ratio), corrosion resistance, non-toxicity, etc.: its density is 4.5 g/cm3, slightly heavier than aluminum (2.8 g/cm3), and iron (7~8). Gram/cubic centimeter) light, titanium's corrosion resistance is very strong, at room temperature, even if the aqua regia can not be corroded, titanium can stay in the sea for decades without oxidation, these characteristics make titanium widely used in aerospace and medical field.
2, titanium alloy
The performance of pure titanium is not perfect, industrial use is rarely pure titanium, and more is titanium alloy, because the impurities in titanium will have a great impact on the performance of titanium, adding specific substances will make its performance than pure Titanium is superior, so titanium alloys use a wider range than pure titanium. Adding different substances will produce titanium alloys with different properties.
The exclusive material of Japanese Charmant glasses is a titanium-zirconium alloy (zirconium is artificially added, so Z titanium is not pure titanium according to national standards), and the texture is relatively hard. The biggest benefit of pure titanium is that it does not add other metals like some titanium alloys, and those metals may cause allergies, that is, trace elements in some titanium alloys may cause allergies, while zirconium does not cause Allergy, so Z titanium can not only ensure the strength of corrosion and prevent allergies.
4, memory alloyMemory alloys are the favorite frames recommended by eyewear stores because its characteristics are very obvious and can be easily demonstrated. Therefore, the owner of an optical shop often likes to take a memory alloy frame to fold it off. There are many kinds of memory alloy composition, such as nickel-titanium alloy, gold-cadmium alloy, copper-zinc alloy, nickel-titanium alloy is better quality, the price is more expensive, but also has the characteristics of high strength and corrosion resistance of titanium alloy, but nickel is a Kinds of metals that are likely to cause allergies, if you choose a small brand plating quality but off, easy to remove allergy caused by deplating. The price of other memory alloys is relatively cheap. It is necessary to prevent shopkeepers from taking shots of nickel-titanium alloys. The memory alloy's temples are generally as thin as the iron, so they are lighter.
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