B₄C–TiB₂ ceramic composites were fabricated by a two-step method. First, B₄C–TiB₂ composite powders were synthesized from TiC–B powder mixtures at 1400 ℃, then mixed with commercial B₄C powders by ball milling and the B₄C–TiB₂ ceramic composites were prepared by hot pressing at 1950 ℃. This two-step method not only effectively refined TiB₂ grains, but also allowed the composition of the composites to be freely designed. The microstructure and mechanical properties of the composites were investigated. The results showed that the B₄C–TiB₂ ceramic composite with a 10 wt% TiB₂ content obtained the ideal comprehensive performance, with a volume density, Vickers hardness, bending strength, and fracture toughness of 2.61 g/cm³, 35.3 GPa, 708 MPa, and 5.82 MPa m^1/2, respectively. The advantages of the in-situ reaction process were fully exerted by the two-step method, which made a remarkable contribution to the excellent properties of B₄C–TiB₂ ceramic composites.

B ₄ C-TiB ₂陶瓷复合材料采用两步法制备。首先，将TiC-B粉末混合物在1400 ℃下合成B ₄ C-TiB ₂复合粉末，然后与商业B ₄ C粉末通过球磨混合，在1950年热压制备B ₄ C-TiB ₂陶瓷复合材料℃。这种两步法不仅有效地细化了 TiB ₂晶粒，而且还允许自由设计复合材料的成分。研究了复合材料的微观结构和力学性能。结果表明，含 10 wt% TiB的 B ₄ C-TiB ₂陶瓷复合材料₂含量获得了理想的综合性能，体积密度、维氏硬度、弯曲强度和断裂韧性分别为2.61 g/cm ³、35.3 GPa、708 MPa和5.82 MPa m ^1/2。两步法充分发挥了原位反应过程的优势，为B ₄ C-TiB ₂陶瓷复合材料的优异性能做出了显着贡献。