TiB, TiC and La₂O₃ hybrid-reinforced Ti-6Al-4V matrix composites were fabricated by common casting and processed by the following forging and isothermal extrusion. The texture evolution, dynamic recrystallization (DRX) behavior and mechanical properties of the as-extruded composites were investigated. The results show that DRXed regions and deformed regions formed during extrusion, strong 〈0001〉_α, \( \left\langle {10\bar{1}0} \right\rangle_{\alpha } \) and weak \( \left\langle { 1 0 {\bar{\text{1}}\text{1}}} \right\rangle_{\alpha } \) fiber textures parallel to extrusion direction were formed due to the selection of slip system in α phase and inheritance from phase transformation according to Burgers orientation relationship. Additionally, the orientation of α grain in DRXed regions became randomized in comparison with the deformed regions. Micro-sized TiB short fibers not only acted as source to generated dislocations, but hindered dislocation slip to cause pile-ups around TiB, which is beneficial to stimulate dynamic recrystallization. Submicro-sized La₂O₃ particles distributed at the triple junction of grain boundaries could pin grain boundaries and hinder grain growth. Tensile test results show that the ultimate tensile strength got a 9.8 pct enhancement, from 834.3 ± 10 to 916.0 ± 10.6 MPa, accompanied by simultaneous improvement of elongation from 5.4 ± 0.6 to 12.2 ± 0.7 pct at room temperature. The simultaneous increase of strength and ductility was principally attributed to TiB fracture modes and grain refinement after extrusion.

TiB，TiC和La ₂ O ₃杂化增强的Ti-6Al-4V基体复合材料是通过普通铸造制造的，并通过以下锻造和等温挤压加工而成。研究了挤压复合材料的织构演变，动态再结晶行为和力学性能。结果表明，在挤压过程中形成了DRXd区和变形区，强<0001> _α，\（\ left \ langle {10 \ bar {1} 0} \ right \ rangle _ {\ alpha} \）和弱\（\ left \ langle {1 0 {\ bar {\ text {1}} \ text {1}}} \ right \ rangle _ {\ alpha} \）由于在α中选择了滑移系统，因此形成了与挤出方向平行的纤维纹理相和根据Burgers取向关系从相变继承。另外，与变形区域相比，DRXd区域中的α晶粒的取向变得随机。超细的TiB短纤维不仅充当位错的来源，而且阻碍位错滑移，导致TiB周围堆积，这有利于刺激动态再结晶。亚微米级La ₂ O ₃分布在晶界三重交界处的颗粒会束缚晶界并阻碍晶粒生长。拉伸试验结果表明，极限拉伸强度提高了9.8 pct，从834.3±10 MPa提高到916.0±10.6 MPa，同时在室温下将伸长率从5.4±0.6提高到12.2±0.7 pct。强度和延展性的同时提高主要归因于TiB断裂模式和挤压后晶粒细化。