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TC4/TC11 dual alloy specimens with different component gradients in the transition zone, were prepared by laser deposition technique. The effects of different transition layer number and different heat treatment on the microstructure, tensile properties and micro-hardness of TC4/TC11 dual alloy interface were investigated. The results show that the transition layer number has a great influence on the morphology of the microstructure, and the increase of the transition layer reduces the interface difference between TC4 and TC11 alloys and makes the micro-hardness distribution more uniform. The change of deposited TC4/TC11 transition basket-weave microstructure is obvious, the microstructure after stress relief annealing is much more uniform and the microstructure after solution-aging treatment is much coarser and the difference is obvious. Form the room temperature tensile test results on specimens after stress relief annealing, it can be concluded that the increase of transition layer improves the tensile strength and plasticity of TC4/TC11 dual alloy, and that fractures occurs on the side of TC4 titanium alloy, which shows that the transition interface performance of TC4/TC11 dual alloy is good.