Porous NiTi (PNT) shape memory alloys has been attracted extremely attention in recent years as suitable biomaterial for use as dental or orthopedic implants due to their unique mechanical properties and good biocompatibility. Their porous structure permits the formation and ingrowth of new bone tissue. However, pores can act as the weakener factor of mechanical properties and obstacle its use as hard tissue implants for heavy load-bearing applications. The erosion possibility at load-bearing surfaces of this materials is another important challenge for such applications. It has been demonstrated that embedding a small amount of hard nanoparticles in the matrix can effectively strengthen and enhance the wear resistance of the intermetallics. However, addition of ceramic nanoparticles to the PNT matrix has not been reported so far. The first purpose of present research was the fabrication of T using Mechanically Activated Self-Propagating High-Temperature Synthesis (MASHS) method. The second objective was production of porous NiTi-TiN nanocomposites employing optimized processing conditions of MASHS. In the first set of experiments, several reactant mixtures of activated Ni and Ti elemental powders with varying chemical compositions (with 0 , 5 and 10 wt.% TiN nanoparticles) were prepared for combustion synthesis in argon (or nitrogen) atmosphere. In the next stage, the effect of various parameters such as milling time, process control agent (PCA) and preheating temperature on the behaviuor of combustion wave and properties of products were investigated. The results showed that mechanical activation led to formation of stable combustion front wave and porous products with fine and homogeneous microstructure. However, excessive milling led to shifting the mechanism of reaction to purely solid state combustion and insufficient strength in final products. Using X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS), it was shown that B2(NiTi) and B19'(NiTi) were present as the dominant phase in all samples with some amount of Ni 3 Ti and NiTi 2 intermetallic compounds. The porosity measurement revealed that the general porosity of samples were between 42 to 59 vol.% and the open porosity ratio was in the range of 61 to 91%. The pore structures of the products were also studied by scanning electron microscopy (SEM) and the size of most pores were determined between 100 to 600 ?m. Moreover, the preheating temperature was found to have a significant effect on the pore morphology and amount of secondary phases. Mechanical properties of elected MASHS-synthesized porous products was evaluated by utilizing the uniaxial compression test and results indicated that the ultimate compressive strength of (NiTi-5% TiN) nanocomposite was 55% higher than NiTi sample without reinforcing phase. However, adding 10wt.% TiN nanoparticles caused to increasing the Young's modulus, lowering the strength and intensive brittleness of product. It is worthy to mention that although PNT synthesized in this study, possess the qualification demands for use as biomedical implants however merely porous (NiTi-5% TiN) nanocomposite is advisable as a novel candidate for heavy load-bearing orthopedic implants from the mechanical properties viewpoint. Keywords: Porous Nitinol, TiN Nanocomposite, Mechanical Activation, Combustion Synthesis