The morphology of in-situ synthesized TiC and TiB2 in laser cladding NiCrBSiC coatings on TC4 alloy was observed by atom force microscope (AFM), scanning electron microscope (SEM) and transmission electron microscopy (TEM), and the growth mechanism of TiC and TiB2 phase was discussed. The results show that, TiC phase in the coatings is equiaxial dendrites with facet and non-facet growth interfaces (the growth interface presents non-facet for small dendrite and facet for large dendrite). TiB2 phase shows flat hexagonal prism which heterogeneously nucleates on TiC dendrite and grows with faceted mode. The special structure with TiC in the core and TiB2 in the exterior was obtained.