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In this work data on results of powders mix activation in a planetary spherical mill are presented at various modes of processing. For researches were chosen powders of aluminum oxide and copper. The ratio of initial powders mass and processing time in a spherical mill varied. Results showed that the increase in time of processing leads to powders particles crushing and introduction of firmer aluminum oxide powder particles in copper particles. Changes of powders phase structure in the activation course don't occur. Particles agglomerations at processing time till 5 minutes also it is not observed.