本发明公开了一种α‑β型高强、高冲击韧性钛合金，由以下质量百分数的成分组成：Al4.5％～6.0％、Zr1.5％～2.5％、Mo0.5％～2.5％、V0.5％～2.0％、Fe0.5％～2.0％、Cr1.5％～3.0％，余量为Ti和不可避免的杂质；本发明还公开了一种钛合金的制备方法，该方法以大量TA15回收料为原料。本发明的钛合金通过控制Moeq和Aleq，有效提高了其强度、塑性及韧性，满足了高强韧性能的匹配，同时分别采用Mo‑V‑Cr‑Fe系、Al‑Zr系强化β相和α相，增强了耦合强化效果，提高了强韧性匹配；本发明以TA15回收料为原料，降低了制备成本，解决了TA15残料的回收问题。

 The invention discloses an alpha-beta high-strength high-impact-toughness titanium alloy which is prepared from the following components in percentage by mass: 4.5 percent to 6.0 percent of Al, 1.5 percent to 2.5 percent of Zr, 0.5 percent to 2.5 percent of Mo, 0.5 percent to 2.0 percent of V, 0.5 percent to 2.0 percent of Fe, 1.5 percent to 3.0 percent of Cr, and the balance Ti and inevitable impurities. The invention further discloses a preparation method of the titanium alloy. According to the method, a large number of TA15 reclaimed materials are adopted as raw materials. According to thetitanium alloy provided by the invention, through controlling Moeq and Aleq, the strength, the plasticity and the toughness of the titanium alloy are effectively improved, and the requirement on the combination of high strength and high toughness is met; meanwhile, Mo-V-Cr-Fe series and Al-Zr series enhanced beta phase and alpha phase are adopted, so that a coupling enhancement effect is improved,and the combination of high strength and high toughness is improved; and according to the alpha-beta high-strength high-impact-toughness titanium alloy provided by the invention, the TA15 reclaimed materials are adopted as the raw materials, so that the preparation cost is reduced, and the recycling problem of TA15 residues is solved.