Forging method of large-specification TA15 titanium alloy special-shaped forging stock

The invention discloses a forging method of a large-specification TA15 titanium alloy special-shaped forging stock. The forging method comprises the following steps of 1, cogging forging; 2, grain refining treatment; 3, intermediate billet forging; and 4, forming forging. According to the forging method of the large-specification TA15 titanium alloy special-shaped forging stock, through reasonableconfiguration of the forging heating number and the deformation temperature, optimization of a deformation mode and a forming method and reasonable setting of parameters such as the rolling reductionand the feeding amount in a forging process, the structure uniformity of the forging stock is effectively improved, the flaw detection level of the forging stock reaches phi 2.0-9dB or above, and meanwhile the anisotropy of the forging stock is reduced, the structure property uniformity and stability control technology of the TA15 titanium alloy large-specification special-shaped forging stock issuccessfully broken throug