Results of investigations into the behavior of plastic deformation macrofragmentation and macrolocalization in aluminum single crystals in which constrained shear volumes can be distinguished for the family of {111} planes under maximum loading are presented. Single crystals with the following three orientations: [111], [112] , and [001] are investigated. It is established that in such single crystals, plastic deformation macrolocalization is observed under uniaxial compression with the formation of reorientation regions whose shapes and sizes depend on the single crystal orientation.