The material can cost ten or even tens of times as much as pure titanium. It's also a class of titanium alloys, but it's super elastic, and it's shape memory. We once made a toy out of memory titanium, which was a lotus flower. Normal temperature is placed there is a closed flower, a cup of warm water poured on it, it opened, and so slowly cooling, and closed. The temperature can be set. Shape can also be set. Again such as orthopaedic common patella claw refrigerator low temperature state, can be bent into any shape, the operation of the paw break off, placed on the patient's broken patella, to be the temperature of the patella claw rise, it will tightly grasp the patella, and try to become a preset shape.
The memory alloy used for eyeglass frames takes advantage of its super-elastic properties at certain temperatures (it is several times more elastic than stainless steel), rather than its memory function. At present, the best memory titanium smelting processing is Japan, the material industry's super cattle boss. Although memory titanium is a titanium alloy like β-titanium, it is difficult for scrap materials to pass off as β-titanium. Therefore, the frame of memory titanium is still more expensive. The frame in the following picture, which is similar in style, has a difference of 100 yuan between memory titanium and β-titanium. You know at the factory stage a difference of 100 yuan is very much.
Moreover, compared to β-titanium, memory titanium is too difficult to process, because it is so elastic that it is difficult to shape, which is impossible at room temperature, and memory titanium heat treatment is another difficult and even secret process. As for welding, it is also much more difficult than β-titanium or pure titanium. But the glasses shop assistant casually said "memory titanium" is not necessarily this kind of memory titanium, may be in the eyes of many employees, good elasticity such as β-titanium can be called memory titanium. True memory titanium is much more elastic than beta titanium. The mirror with Memory Titanium on its leg is more formal. In fact, the average optical shop, actually use memory titanium, very few. Because the price is higher and consumers don't feel it right away and don't want to pay more for it.
