The novel gradient porous titanium, with the outer high porosity and inner low porosity, was prepared by a powder metallurgy method in order to solve the problem of high porosity and low strength of singer-layer porous titanium (SPT). The compressive strength (CS) and Young’s modulus (YM) of the gradient double-layer porous titanium (DPT) are 117.50~143.55 MPa and 1.95~3.08 GPa, respectively, when its inner porosity is about 30%, outer porosity more than 65% and the pore size range 100~255 μm. The inner/outer pore size and porosity are of gradient distribution. The mechanical properties of the DPT are further improved through adding rare earth lanthanum fluoride (LaF3) to the outer layer. The CS and YM of the DPT with 0.05wt% LaF3 in outer layer are up to 213.76 MPa and 3.38 GPa, respectively.