Advanced coating technologies and surface techniques are needed to apply high-performance materials in hostile environments. It is possible to get a unique mix of bulk and surface properties by using thermal spraying to apply metallic coatings and then diffusion-based boriding to finish. Boriding enhances the surface hardness of materials and protects against wear efficiently. Several studies have shown that crystal lattice defects and residual stresses primarily affect boron diffusion in the boriding process. Thermally sprayed coatings exhibit a significant degree of deformation due to particle impact, resulting in the presence of defects and stress. This study examined the effect of thermal diffusion-based boriding on HVOF-applied 316L coating. Due to the high coating adherence, no delamination occurred during the thermal diffusion-based boriding. Through the application of the boriding coating, the hardness, wear resistance, and coefficient of friction were all enhanced. There is a possibility that surface boriding will increase the durability of the coating.