Forging method of high-detectability Ti555211 titanium alloy bar

The invention belongs to the technical field of non-ferrous metal processing, and relates to a forging method of a high-detectability Ti555211 titanium alloy bar. Refined beta grains are forged over a phase transformation point in a manner of 'high-low-high+continuous forging+ recrystallization heat treatment', and static recrystallization and dynamic recrystallization processes are regulated and controlled to lay a good foundation for the uniformity and consistency of tissues; the alpha grains are forged, refined and homogenized below the phase transformation point, then the beta grains are in a uniform and ideal initial state through deformation above the phase transformation point, and an ideal platform is provided for subsequent refining of the grains below the phase transformation point; and finally, the mode of small deformation and multi-pass rapid forming is used in the forming heating number, uneven deformation of the bar is prevented, surface cracks are prevented from being generated, the phenomenon