Titanium–titanium boride (Ti/TiB) metal matrix composites have been widely identified as promising materials for various applications. The traditional ingot metallurgy processing strategies used to fabricate these materials are energy intensive and have fallen short of their perceived mass production potentials. Powder metallurgy processing, especially that aimed at in-situ synthesis of Ti/TiB composites from titanium and TiB₂ powder blends, is currently widely used for the cost-efficient production of such composites. However, this approach usually results in excessive sintered porosities and associated mechanical property degradation. Therefore, further thermomechanical or hot isostatic pressing steps are required for porosity reduction. In the present study, low-porosity Ti/TiB composites were synthesized using TiH₂ and TiB₂ powders via a simple press-and-sinter hydrogen-assisted blended elemental powder metallurgy route. The manufacturing route included two stages. Compaction and vacuum sintering of the noted blended powders was followed by hydrogenation and ball milling of the pre-sintered product to produce a hydrogenated, pre-alloyed powder. This was followed by compaction and final sintering. X-ray diffraction, light microscope, and scanning electron microscope were employed to investigate the powder morphology and material microstructures after various processing steps. The role of temporary alloying with hydrogen was established in tailoring the microstructure. When an optimized particle size distribution that was carefully controlled using a Malvern Mastersizer laser analyzer was combined with optimized hydrogenated pre-alloyed Ti/TiB powder compaction and sintering parameters, a nearly dense, uniform composite was formed. The above approach can be considered a promising solution for economical manufacturing of Ti/TiB parts with improved properties, such as a high performance-to-cost ratios.

钛-钛硼化物（Ti / TiB）金属基复合材料已被广泛认为是具有各种应用前景的材料。用于制造这些材料的传统铸锭冶金加工策略需要消耗大量能源，并且尚未达到其潜在的大规模生产潜力。粉末冶金加工，特别是针对原位由钛和TiB ₂粉末混合物合成Ti / TiB复合材料，目前被广泛用于这种复合材料的低成本生产。但是，这种方法通常导致过度的烧结孔隙率和相关的机械性能下降。因此，需要进一步的热机械或热等静压步骤以降低孔隙率。在本研究中，使用TiH ₂和TiB ₂合成了低孔隙度的Ti / TiB复合材料通过简单的压制和烧结氢辅助混合元素粉末冶金方法制备粉末。制造路线包括两个阶段。将所述混合粉末压实和真空烧结，然后对所述预烧结的产物进行氢化和球磨，以生产氢化的，预合金化的粉末。随后进行压实和最终烧结。采用X射线衍射，光学显微镜和扫描电子显微镜研究了各种加工步骤后的粉末形态和材料微观结构。在调整微观结构中确立了与氢临时合金化的作用。将使用Malvern Mastersizer激光分析仪仔细控制的最佳粒度分布与优化的氢化预合金Ti / TiB粉末压实度和烧结参数结合在一起时，可以形成几乎致密，均匀的复合材料。上述方法可以被认为是经济地制造具有改进的特性（例如高性价比）的Ti / TiB零件的有前途的解决方案。