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The Ti–35Nb–7Zr–5Ta (wt%, TNZT) alloy was reinforced with TiB 2  and synthesized by L-PBF. The relatively small TiB 2  particles change the solidification structure from cellular to columnar-dendritic and lead to submicron TiB precipitation in the β matrix. This results in pronounced grain refinement and reduction of texture. However, the microstructure of the additively manufactured TNZT-TiB 2  is still different from the as-cast, unreinforced TNZT, which contains equiaxed and randomly oriented grains. The β phase is less stable in the as-cast samples, leading to stress-induced martensitic transformation and recoverable strain of 1.5%. The TNZT with 1 wt% of TiB 2  presents significantly higher compressive strength ( σ  YS  = 495 MPa) compared to unreinforced samples ( σ  YS  = 430 MPa), without sacrificing ductility or altering Young’s modulus ( E  ≈ 46 GPa). The addition of a small fraction of TiB 2  to the TNZT alloy synthesized by L-PBF is a promising alternative for manufacturing sophisticated components for biomedical applications. Graphical abstract

Microstructure and properties of TiB2-reinforced Ti–35Nb–7Zr–5Ta processed by laser-powder bed fusion