<p>Fe-Cr-C deposited alloys are widely used in surface engineering technology due to their excellent wear resistance and low cost. M₇C₃ primary carbide with high hardness in the microstructure of deposited alloy is the main factor to ensure the wear resistance of deposited alloy. However, during the wear process, the coarse M₇C₃ primary carbide is not only easy to peel off from the matrix structure, but also leads to the decrease of the wear resistance of the material and accelerates the wear of the mechanical parts. Therefore, the optimization of alloy composition of Fe-Cr-C deposited alloy is carried out to obtain the most excellent wear resistance of deposited alloy, which has practical application value for expanding the potential application of wear-resistant deposited alloy and promoting the development of wear-resistant deposited alloy. In this paper, Fe-Cr-C-N-Ti self-shielded wear-resistant surfacing flux-cored wire was independently developed by changing the Ti content. Through surfacing experiments, it was found that the size of TiN hard phase particles in the final solidification structure of Fe-Cr-C-N-Ti deposited alloy was fine, dispersed in the deposited alloy matrix, and partially distributed at the austenite grain boundary. When the Ti content reached 4.00 wt.%, the amount of TiN precipitation was the largest. The study of the strengthening mechanism of the deposited alloy found that TiN was not only pinned the grain boundary to play the role of fine grain strengthening, but also acted as a heterogeneous nucleation particle of eutectic carbide M₇C₃ to promote the precipitation of M₇C₃. Through the combined action of fine grain strengthening and precipitation strengthening, the mechanical performance of the deposited alloy was enhanced, and its wear resistance was notably boosted.</p>