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In order to investigate the effect of cold-rolling and aging on precipitation and recrystallization behavior of Al-Er-Zr alloy, two thermo-mechanical processes containing peak aging+cold-rolling (A+CR) and cold-rolling+ isochronal aging(CR+A) were studied.The results show that the cold rolling can improve significantly the peak hardness (~7 HV) and annealing after the A+CR process can improve the conductivity (~1% IACS).