Common bicycle frame materials are aluminum alloy, steel, carbon fiber, titanium alloy.

The 6 series aluminum has medium strength, good plasticity and excellent corrosion resistance. It has excellent weldability, good corrosion resistance and cold workability, and is an alloy with a wide range of applications. Suitable for a frame or other aluminum products that need to be welded.

7 series aluminum alloy is another commonly used alloy with a wide variety. It contains zinc and magnesium. Among the more common aluminum alloys, the best strength is 7075 alloy, but it cannot be welded, and its corrosion resistance is quite poor, and it is mostly used for CNC cutting. The 7 series aluminum, represented by 7075, is more suitable for single-piece high-strength aluminum parts such as chainrings that do not need to be welded.

Steel is a general term for iron-carbon alloys with a carbon content between 0.02% and 2.06% by mass.

Steel frame bicycles mostly use chromium-molybdenum steel materials, and alloy steels with chromium and molybdenum are added. Molybdenum can increase the strength of steel and prevent temper brittleness. Chromium can improve the alloy's corrosion resistance, rust resistance, and the ability to prevent high-temperature oxidation.

Carbon fiber is a new type of fiber material with high strength and high modulus fiber with a carbon content of more than 95%. It is a microcrystalline graphite material obtained by piling up flake graphite microcrystals and other organic fibers along the fiber axial direction and undergoing carbonization and graphitization treatments. Carbon fiber is "flexible on the outside and rigid on the inside", and its mass is lighter than that of metal aluminum, but its strength is higher than that of steel, and it has the characteristics of corrosion resistance and high modulus.

Titanium alloy, titanium is an important structural metal developed in the 1950s. Titanium alloy is widely used in various fields because of its high strength, good corrosion resistance and high heat resistance.

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