What is Aluminum Alloy Eyeglasses frame? Does it just metal frames? I checked several online eyeglasses shop, found this kind of frame is very expensive. And acetate frame is fine, but much cheaper. I want to know more details about this materia.

Frames made from aluminum are lightweight and highly corrosion-resistant. Aluminum is used primarily by high-end eyewear designers because of the unique look it creates. Aluminum is not only the world's most abundant, but also the most widely used, nonferrous material. Pure aluminum is actually soft and weak, but commercial aluminum with small amounts of silicon and iron is hard and strong. But this material frame is not common product, and customers must specially custom from optical stores. Hope those could help you.