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The development of a reagent for dislocation etching of high‐purity zinc alloys with copper or aluminum, not requiring decoration of the dislocations, allowed the study of dislocation arrangements in bent alloy crystals. Most of the dislocations were found in the unannealed condition to be arranged in disconnected wall segments perpendicular to the basal plane, showing that the solutes had little, if any, effect on mechanical polygonization during bending. Their effect on the rate of subsequent thermal polygonization and of subgrain growth was also found to be surprisingly slight.