Impact of hot rolling on the evolution of microstructure and mechanical properties of sintered commercially pure Ti compacts

While titanium (Ti) alloys offer significant advantages, such as high strength and corrosion resistance, their widespread utilization in various engineering sectors is hindered by their prohibitively high cost, which is attributed to expensive equipment and complex preparation processes. The present study centered on assessing the influence of multi-pass hot rolling, a commonly available industrial process, on the microstructure and mechanical properties of sintered powder metallurgy commercially pure Ti (cp-Ti). With increasing levels of accumulated deformation, the rolled materials exhibited a refined grain size, the formation of twins, and a reduced residual porosity, resulting in a tailored microstructure that enhanced the material's balance between strength and ductility. The ultimate tensile strength reached 574.8 MPa, with an elongation at break of 28.1%. The hardness peaked at 196.4 HV. •Multi-pass hot rolling was implemented on press-and-sintered commercially pure Ti.•Refined microstructure with optimized mechanical properties could be tailored.•The mechanisms of fracture failures along with strengthening factors were revealed.