Samples　of　5052　Al　were　subjected　to　constrained　groove　pressing　(CGP)　under　the　conditions　with　different　tooth　widths　and　pass　numbers.　The　microhardness　was　recorded　on　the　polished　XOZ　plane　of　each　sample　and　the　results　were　plotted　to　provide　a　pictorial　depiction　of　the　homogeneity.　The　results　show　that　the　microhardness　increases　significantly　after　CGP　but　is　independent　upon　tooth　width.　The　microhardness　distribution　is　homogeneous　in　the　non-pressed　condition　but　inhomogeneous　after　a　single　pass　and　then　reasonably　homogeneous　in　subsequent　passes.　The　results　reveal　that　the　essential　reason　of　inhomogeneity　is　the　existence　of　the　interface　region　between　the　shear　and　flat　regions.　It　is　shown　that　good　homogeneity　may　be　achieved　through　CGP　pressing　by　increase　the　number　of　pass　or　the　width　of　pressing　tooth.