Effect of Cold Work and Heat Treatment on Mechanical Properties and Biocompatibility of Ti–10Cr Alloy

Ti–10Cr alloy is a beta titanium alloy that exhibits variable Young’s modulus, which can be beneficial for spinal implants. This study investigates the effects of cold deformation and heat treatment on the mechanical and biocompatibility properties of Ti–10Cr alloy. The ingot was homogenized, hot rolled, and annealed at various temperatures. Cold rolling was performed with different thickness reductions to examine the Young’s modulus variation. Cell culture was employed to evaluate the biocompatibility. The microstructure and tensile test results of the heat-treated samples showed that recrystallization occurred during annealing, and 900 °C was the optimal heat treatment temperature. The Young’s modulus exhibited the highest variation when the thickness was reduced by 10%. Moreover, the biocompatibility tests revealed that Ti–10Cr had higher biocompatibility than Ti–6Al–4V alloy.