In the present work, a new method of molten salt reaction for titanium metallization of Si3N4 has been developed. It was found that the decomposition of the titanium divalent compound led to the formation of a titanium coating. The thickness or weight gain per surface area of the coated sample increased with treating time and temperature. When the treating temperature was below 1123 K, the deposition process was controlled by the combination of interfacial reaction and the diffusion of N, Ti or Si in the coating layer, but when the temperature was above 1123 K, the process was only controlled by the diffusion of these elements. Field emission SEM observation revealed the multi-layer structure of TiN and Ti5Si3 at the interface. Based on the thermodynamic calculations and other analysis, the possible reactions were determined.