研究了一种新型Ti-Al-Cr-Mo-W系高强、高韧β钛合金显微组织与力学性能的关系。结果表明,相变点之下固溶时效处理得到的含有等轴或短棒状初生α、细小片层次生α的混合组织的强度超过1400 MPa,断裂韧性达到50.7 MPa·m~(1/2),该性能表明合金与同类高强钛合金相比具有更优异的强-韧性匹配。β区固溶缓冷处理得到的魏氏组织相比于混合组织具有较低的强度和较高的韧性。 The relationship between the microstructure and the mechanical properties of a novel Ti-Al-Cr-Mo-W high-strength, high-toughness β titanium alloy was studied. The results show that the strength of the mixed microstructure containing primary α and fine secondary α formed by solution aging treatment under the transformation temperature is over 1400 MPa and the fracture toughness reaches 50.7 MPa · m ~ (1/2) This performance indicates that the alloy has superior strength-toughness matching compared with similar high-strength titanium alloys. The Widmanstatten obtained by solution-annealing treatment in β zone has lower strength and higher toughness than the mixed tissue.