<p>Laser Directed Energy Deposition (LDED) has emerged as a prominent technique for fabricating Functionally Graded Materials (FGMs). However, existing research predominantly focuses on unidirectional gradients, whereas multidimensional FGMs present challenges in controlling geometric consistency, microstructure evolution, and mechanical properties due to their complex compositional distribution. This study utilizes Response Surface Methodology (RSM) to optimize process parameters. It successfully fabricates TC4/TiC multidimensional FGM specimens using LDED, investigating microstructure evolution and the distribution characteristics of mechanical properties. We performed process optimization to ensure the geometrical consistency of the graded samples, avoided defects like lack of fusion, and achieved multidimensional graded variations along the deposition and horizontal directions. The microstructure transitions from fine particles to dendritic structures and ultimately to coarse TiC particles as the TiC content increases. The grain refinement effect has leveled off, the number of high-angle grain boundaries has increased, the texture strength has weakened, and the elemental gradient distribution has become significant. Microhardness has shown a gradient variation along both the deposition and horizontal directions. Increasing TiC content significantly enhances friction and resistance. Compared to pure TC4, the average wear mass loss is reduced by 49%. This study provides a theoretical basis for the controllable preparation of multidimensional FGMs and is significant for their application and development.</p>