Why titanium and nikel glasses frames are better than ordinary metal?

[San Juan Capistrano]

please explain why titanium and nikel glass (spectacles) frames are better than ordinary meatals? Thanks

[San Juan Pueblo]

They are more durable and lighter than other metals. They are also hypo-allergenic and corrosion-resistant and don't oxidize at normal temperature.

[San Leandro]

Because they are more durable than ordinary matel. Titanium and nikel have the unique properties, shape memory and superelasticity. That is to say, They can restore to original shape after being bended without undergoing deformation. And they have enormous elasticity, some 10-30 times that of ordinary metal.