[en] Kinetics of radiation-induced point defects in metals is studied. It was necessary to carry out rather a detailed analysis of the problem in veiw of a classical simplicity of the corresponding equation system and its sufficient impor-tance for the defect theory. A phenomenon of substantially nonlinear, explosive stability has been revealed. The conditions have formulade tions have formulated under which the summary defect concentration in the relaxation processes through two extremes. A detailed dicussion is made of the resonance phenomenon bet-ween the relaxation (synchronous- and singular relaxation) rates, and of specific features of two-stage relaxation at lar-ge pumpings. The calculation results may be used for clari-fication of the substance parameters and radiation physics of defes of defects