 Type titanium alloys with low Young's modulus are required to inhibit bone atrophy and enhance bone remodeling for implants used to substitute failed hard tissue, while metallic biomaterials with variable Young's modulus are required to satisfy the needs of both patients and surgeons. Effective methods have been discussed to improve the static and dynamic strength while maintaining low Young's modulus for type titanium alloys used in biomedical applications. The advantage of low Young's modulus of type titanium alloys in biomedical applications has been discussed from the perspective of inhibiting bone atrophy and enhancing bone remodeling, and the development of type titanium alloys with a self-adjusting Young's modulus for use in removable implants has also been discussed.