Reinforced silicon carbide matrix by silicon carbide nano fibers, her after SiC_f/SiC_m; is a promising materials for nuclear fusion applications, due to the engineering aspects of the SiC_f/SiC_m materials; related to its limited thermal conductivity and durability, it was indispensable to make cladding of SiC_f/SiC_m substrate by higher thermally conductive, durable material such as Tungsten. This article discussed the conditions of the processing to produce durable joining between tungsten and SiC_f/SiC_m by hot pressing technique. The article discussed the correlation between these conditions and the microstructure evolution of the product at the fusion layer. The correlation between microstructure evolution and mechanical properties of the produced hybrid component of W- SiC_f/SiC_m was studied as well.