Best material for rimless glasses frames

[cheap eyeglasses]

Frameless style eyeglasses are very popular these days, fashionable and stylish, and they can show face shape perfectly without hiding anything, the lenses have no longer the protection from a full frame provided by full-frame eyeglasses, so, I find it is really tough to find the right frame material for such eye wears, as and they only use some screws to connect the lenses with the temples and the bridge, which frame material have the features of durability and strength?
Thank you!