Aluminum alloy-sports car, often used, different alloys have different properties, generally speaking, it is hard+light.

Titanium alloy-thin+durable+soft, very durable.

Magnesium alloy-scandium-containing alloy, light and hard.

Scandium alloy-magnesium alloy is light and hard.

Carbon fiber-should be the lightest material, with high hardness, which is often used in high-performance racing cars, but its durability is poor, and it will be almost the same after several falls.