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The stability,bonding,work of adhesion and electronic structure of the U/W interface with and without Ti were investigated by first principles to explore the mechanical properties of W particles enhanced U-Ti alloy matrix composite as a construction material.The calculated results indicate that the preferable orientation of the U/W interfacial structure is (001)u/(110)w crystallographic plane,Ti atoms originating from U slab are prone to diffuse into W slab through the interface,and additional Ti in U matrix is the stronger adhesion to W,with an ideal work of adhesion of 6.93 J·m-2 for U-Ti/W interface,relative to the value of 6.72 J·m-2 for clean U/W interface.The stronger adhesion performance is due to the increase in valence electron hybridization for U-Ti/W compared with U/W interface,as evidenced by the characteristic of the local density of states for the interfacial atoms.