Titanium alloy rolling blanks are usually larger-sized forged rods. Due to different cooling rates, the structure of the forged rod at room temperature is a -transformation structure in the form of needle-like, fine flakes or thick flakes.

This structure has high creep resistance and fracture toughness, but low fatigue strength and tensile plasticity. The processing of titanium alloy rods usually hopes to obtain an equiaxed structure with good tensile and fatigue properties. However, the lamellar structure of the forged rod is very stable at room temperature, and it can only be made equiaxed through strong deformation in the two-phase zone, so The high deformation resistance and difficulty in deformation of titanium alloys at room temperature are one of the reasons that restrict the rolling forming of titanium alloys. Therefore, the rolling forming of titanium alloys is usually performed at a certain temperature.