The post-treatment of thermally sprayed Ni-based coatings is extremely important to deliver highly qualitative components. NiCrBSi-TiB₂ mechanically mixed powder in four different volumetric concentrations was flame-sprayed onto S355JR steel and post-processed in a high temperature vacuum furnace. The holding time and temperature of the heat treatment was optimized through a central composite design and the concentration delivering the best results was selected for further examination. The microstructural complex and dense obtained coating presented a strong metallurgical bonding at the interface region with a high interface fracture toughness. Tribological and corrosion tests were additionally performed in comparison with a NiCrBSi flame-sprayed coating as reference sample. Non conformal pin-on-disc tests showed that although the coefficient of friction of the two tested samples was similar, the wear rate of both sample and counterpart of the TiB₂ containing coating was significantly lower. Electrochemical tests in 3.5% NaCl solution showed that the alloyed coating exhibits lower corrosion current densities and a more positive breakdown potential than the reference sample. A negative effect of addition of TiB₂ ceramic particles to the Ni-based coating regarding its corrosion behaviour in a chlorine containing environment could not be established.