Abstract: The fluidity, loose packing density, and vibrating density of titanium powders with different powder sizes were studied and analyzed, and the porous titanium sheets were prepared by rolling and sintering using the corresponding titanium powders to meet the demand of hydrometallurgy. Effect of the powder sizes on the mechanical properties of the porous titanium sheets were detailed discussed. The results show that, the maximum pore size and porosity of titanium sheets decrease with the decrease of powder size, while the density shows an opposite trend, and the tensile strength, elongation, shear strength, and bending strength of the porous titanium sheets increase with the decrease of powder size. The porous sheets prepared by the titanium powder size ranging from 89 μm to 104 μm exhibit the better comprehensive mechanical properties.