In the present study, a novel titanium matrix composite with a quasi-network structure was successfully fabricated via the hot-press sintering of the TC4 powder and Ti₂AlC precursor at 1200 °C and 25 MPa. To explore the effect of the Ti₂AlC content on the microstructure and properties of the prepared composites, 1–8 vol% Ti₂AlC was selected as the representative samples. Microstructural analysis showed that the initial Ti₂AlC was transformed into TiC_x, and Al atoms diffused into the TC4 matrix to form a Ti(Al) solid solution. The α→β transformation temperature of Ti decreased based on thermal analysis. After increasing the amount of Ti₂AlC, the α phase gradually shifted to equiaxed grains, and the grain size decreased, while the α/β ratio changed. When the content of Ti₂AlC was 3 vol%, the composite’s strength significantly improved, with smaller ductility loss and a tensile yield strength of 939 MPa, tensile ultimate strength of 1007 MPa, compressive yield strength of 1292 MPa, and compressive ultimate strength of 2041 MPa. This strength improvement was attributed to fine-grain strengthening, solid-solution strengthening and second-phase strengthening. Moreover, theoretical calculations indicated that the solid-solution strengthening dominated the improvement efficiency.

_{在本研究中，通过将 TC4 粉末和 Ti 2} AlC 前驱体在 1200 ℃和 25 MPa 下热压烧结，成功制备了一种新型的准网状结构钛基复合材料。为探讨 Ti ₂ AlC 含量对所制备复合材料的微观结构和性能的影响，选择 1-8 vol% Ti ₂ AlC 作为代表性样品。显微组织分析表明，初始Ti ₂ AlC 转变为TiC _x，Al原子扩散到TC4基体中形成Ti(Al)固溶体。根据热分析，Ti 的 α→β 转变温度降低。增加Ti _2的量后在AlC中，α相逐渐向等轴晶转变，晶粒尺寸减小，而α/β比发生变化。当Ti ₂ AlC 含量为3 vol%时，复合材料的强度显着提高，延性损失更小，抗拉屈服强度为939 MPa，抗拉极限强度为1007 MPa，抗压屈服强度为1292 MPa，抗压极限强度为2041兆帕。这种强度提高归因于细晶强化、固溶强化和第二相强化。此外，理论计算表明，固溶强化主导了改进效率。