Ultrahigh-temperature titanium alloy

The invention discloses an ultrahigh-temperature titanium alloy. The ultrahigh-temperature titanium alloy includes the following components by weight percent: 28 to 43 percent of Nb (niobium) and V (vanadium), 10 to 19 percent of Cr (chromium), Mo (molybdenum) and W (tungsten) and 1 to 5 percent of Zr (zirconium) and Al (aluminum), as well as Ti (titanium) and unavoidable impurities; the Nb percentage is larger than or equal to 20 and smaller than or equal to 35, the V percentage is larger than or equal to 5 and smaller than or equal to 18, the Cr percentage is larger than or equal to 5 and smaller than or equal to 13, the Mo percentage is smaller than or equal to 8, the W percentage is smaller than or equal to 6, and the Al percentage is smaller than or equal to 3.5; an ultrahigh temperature means that the operating temperature of the titanium alloy ranges from 850 DEG C to 1,050 DEG C. The ultrahigh-temperature titanium alloy provided by the invention has high thermoplasticity, good cold-working and hot-working manufacturability, as well as excellent cold-workability, so that cold rolling of plates and tubes are available; the tensile strength within the temperature range of 850 to 1,050 DEG C reaches between 80 megapascals and 260 megapascals, which is remarkably higher than that of conventional high-temperature titanium alloys. Therefore, the ultrahigh-temperature titanium alloy is potentially applicable for an environment requiring good high-temperature strength rather than a high bearing force.