Porous titanium based alloys containing 8 wt% and 12 wt% cobalt elements were prepared by gelcasting methods. The concentration of dispersant for obtain the stable suspension slurry were studied. The microstructure, the total porosity and the mechanical properties of the sintered porous Ti-Co alloys were investigated by scaning electronic microscopy, X-ray diffraction, compression and bending tests. The results show that 1 wt% of the optimal dispersant amount is selected, at which viscosity of the suspension slurry is low. Open and closed three-dimensional pore morphologies and total porosity around 50% can be achieved. In contrast to porous Ti by gelcasting available before, porous Ti-Co alloys present excellent properties. The compressive strength ranging from 68-378 MPa, the bending strength ranging from 53.68-169.17 MPa and Young's modulus ranging from 7-21 GPa. In this study, porous Ti-8Co alloy (33 vol%) which have great properties matching adult bone, therefore being suited for medical applications.