Titanium is the latest materials in recent years applied for eye glasses frames. And people like it because titanium is a very good materials. Eyeglasses frames made of titanium are very light weight, durable, flexible and impact resistant. Besides, titanium glasses frames are bendable, even if you twist or bend it, the eyeglasses can return to at least 80% of their original shape. So, titanium is good and useful materials for eyeglasses.
Sweetie, it is the prescription lens that help correct our vision problems. The titanium frame is more durable. But it can do nothing in protecting our eyes. So I think any kind of frame will be OK as long as they can store the prescription lenses for me.
Many people are sensitive to some plastics so the plastic frame is not fit for them. But titanium frame will not lead to allergy. So many people like them. Besides, they are corrosion resistance and lighter than the frames that made by other kind of materials. But tatamium glasses are of less style. They are more durable but less colorful than plastic glasses.