A brief background to compaction equations and their application to titanium powder is presented. The behavior and mechanisms of densification in selected titanium powders is critically analyzed by means of a comprehensive inter-model comparison of existing compaction equations. The results are discussed in terms of the comparative evaluation of cold uniaxial compaction tests of sponge Ti, CP TiH 2 , CP Grade 2 Ti, and TiH 2 -SS316L nanocomposite powder samples, which were conducted at applied compaction pressures of up to 1250 MPa.