Alpha plus beta two-phase titanium alloy and method for processing same

An alpha plus beta two-phase titanium alloy and a method for processing the same relate to an ultrahigh-strength weldable short-time heat-resistant (alpha plus beta) two-phase titanium alloy and a method for processing the same in the field of aerospace and armament. The alpha plus beta two-phase titanium alloy is characterized by comprising the following components by weight percent: 6.5%-7.9% of Al, 1.6%-2.6% of Sn, 1.6%-2.6% of Zr, 1.8%-2.8% of Mo, 0.9%-2.3% of Cr, 1.6%-2.6% of Nb, 0.8%-1.8% of Ni, no more than 0.5% of Si, no more than 0.20% of Fe, no more than 0.10% of C, no more than 0.10% of N, no more than 0.15% of O, no more than 0.015% of H, no more than 0.40% of other impurities and the balance of Ti. The titanium alloy can be welded through adopting an electronic beam welding method, and the strength coefficient after the welding can reach above 0.8. The titanium alloy is the ultrahigh-strength titanium alloy with the tensile strength which can reach above 1200 mega pascals at room temperature and reach the maximum magnitude of 1700 mega pascals; and the alloy has the electronic beam welding characteristic and the short-time heat resistance at high temperature of 600 DEG C.