Crystalline TiN hollow nanocages with pure cubic phase were prepared in large scale using TiO2, N2H4 center dot 2HCl, and Mg as reactants in autoclaves in 300-500 degrees C for 12 h. These hollow nanocages mainly have diameters of 300 to 500 nm and shell thicknesses from 20 to 35 nm. The product obtained with target temperature of 500 degrees C has a BET surface area of 68.13 m(2)/g and pore volume of 0.17 cm(3)/g.