Forging method for improving anisotropy and toughness matching of ultrahigh-toughness beta-type titanium alloy

The invention belongs to the field of novel beta-type titanium alloy hot working, and particularly relates to a forging method for improving anisotropy and toughness matching of an ultrahigh-toughness beta-type titanium alloy. The method comprises the steps that a bar is homogenized, the heating temperature ranges from (T beta + 30) DEG C to (T beta + 100) DEG C, and high-temperature homogenization treatment is conducted for 15-30 h; high-temperature reversing upsetting and drawing forging is conducted, the heating temperature of each heating number is sequentially reduced by 20-50 DEG C, and the heating temperature ranges from (Tbeta + 30) DEG C to (Tbeta + 100) DEG C; forging a blank to obtain a blank; and carrying out isothermal forging on the blank to obtain a forge piece. According to the method, a beta-type titanium alloy forging process specification is formulated, the anisotropy problem of the TB17 titanium alloy is greatly solved, and meanwhile the strength, plasticity and toughness of the TB17 titan