In the development of high performance artificial hip prostheses low Young's modulus for suppressing stress shielding and high strength for both enduring several times the patient's body weight and avoiding dislocation arising from impingement are simultaneously required for a stem. However, a trade-off is known between low Young's modulus and high strength in many alloys. Recently, we have proposed a new concept for stem fabrication that low Young's modulus is given in a distal part by cold working and high strength in a proximal part by local heating after cold working. In order to obtain fundamental information on gradation of temperature and mechanical properties a cold swaged β Ti-33. 6wt% Nb-4wt%Sn rod with 9mm in diameter and 100 mm in length was locally heated at one edge. Temperature distribution on and in the rod was measured by thermography and thermocouples, respectively, as a function of distance from the other edge. Young's modulus and tensile properties were measured using swaged rod samples subjected to various heat treatments, referring to temperature distribution in local heating. It is found that sharp temperature gradation can be obtained from the heated edge toward the other edge because of low thermal conductivity of the alloy, and correspondingly mechanical properties are graded.