The paper presents investigations of aluminum-magnesium alloy deformation behavior under cyclic thermomechanical loading. In each cycle, the temperature is recorded, and the load is increased linearly to a maximum value. Real-time experimental data base is filled with data from three channels: acoustic — acoustic emission RMS voltage (μV); deformation-the value of deformation (%); strain — in tension value (MPa). Experimental data analysis demonstrates both monotonous and jump-like deformations of aluminum-magnesium alloy. At the same time, monotonous strain accumulation is accompanied by a monotonic increase of acoustic emission stress peak RMS values while jump-like accumulation is accompanied by single acoustic impulses. Deformation jumps indicate high correlation and localization of deformation bands on the macroscopic scale. The acoustic emission impulses characterize the high coherence of elementary acoustic signals from the system of deformation bands with interference that generates a single acoustic signal.