I think all glasses are useful because they can help correct our vision problems. Titanium glasses are different from the glasses that made by other kind of materials. They are lighter, more durable, corrosion resistance and won't cause allergy. But some people still don't like them though they have lots of advantages, because they are quite plain and there aren't many styles for people to choose from. But if you want to buy a pair of good glasses, titanium glasses can be a good choice. Good luck!