Cast ingot cogging forging technology for improving structure uniformity of forging stocks of titanium alloy

The invention discloses a cast ingot cogging forging technology for improving the structure uniformity of large-thickness forging stocks of titanium alloy. Cogging forging is carried out on the titanium alloy two heating times under the condition of the heating temperature of 1150 DEG C and 1100 DEG C; the titanium alloy is forged at a heating time under the condition of the heating temperature being 20-45 DEG C below the temperature of a beta phase transformation point; the titanium alloy is forged at a heating time under the condition of the heating temperature being 30-80 DEG C above the temperature of the beta phase transformation point; the titanium alloy is forged 2-5 heating times under the condition of the heating temperature being 20-45 DEG C below the temperature of the beta phase transformation point, and then the large-size titanium alloy forging stocks with the even structure are obtained. The cast ingot cogging forging technology is suitable for large cast ingot cogging and forging stock forging of titanium alloy of an alpha type or an alpha-beta type or an approximate-beta type, and requirements for manufacturing of large-size titanium alloy casting pieces or parts which are needed for manufacturing planes and have high requirements for structure temperature uniformity can be met.