While using low modulus titanium alloys, which is advantageous to suppress stress shielding, some surgeons specializing in spinal diseases, such as scoliosis and spine fracture, pointed out that the amount of spring-back in the implant rods should be small so that the implant offers better handling ability during surgeries; the high Young’s modulus suppress spring-back. Titanium alloys, which satisfy the requirements of both surgeons (high Young’s modulus leading to suppress spring-back) and patients (low Young’s modulus leading to suppress stress shielding) with regard to the Young’s modulus of the implant rod, are currently being developed. The authors have proposed Ti-12Cr as a candidate alloy for solving this problem. Ti-12Cr subjected to solution treatment (Ti-12Cr-ST) exhibits a low Young’s modulus of <70 GPa. On the other hand, the Young’s modulus of Ti-12Cr subjected to cold rolling (Ti-12Cr-CR), is >80 GPa. This increase in the Young’s modulus is due to the deformation-induced ω phase.