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The development of new methods to improve physical and stressstrain properties of materials is an important contribution to the development of modern technologies and targeted control of their behavior. The optimum combination of stressstrain properties and electrical ones to improve performance attributes of materials is very important. The basic purpose of this work is the study of long-term effects in materials resistivity changes after treatment in a glow discharge. There are presented the results of measurements of a resistivity relative value in copper-graphite insertions after a radiation treatment in a glow discharge. The graphic dependences obtained show that in the course of two years in samples a long-lived state, a structure of irradiated composite material remains. It is a sign of that the improvement of performance attributes of insertions investigated bears longterm character. An anomalous temperature dependence of electric resistance after an irradiation treatment if a glow discharge was detected in technical copper samples. First of all this anomaly manifests itself in copper resis-tivity decrease after an irradiation treatment at different temperatures obtained that is contrary to the fact determined of the simultaneous increase of dislocations density in samples irradiated.