This work is devoted to the investigation of the influence of mechanical deformation of photo-thermo-refractive glasses in the temperature range 800-1000 °С on the state of silver nanoparticles. It is shown that halide shell of the silver nanoparticles is dissolved during the sample stretching. That results in the shift and the increase of the plasmon peak on the absorption spectra. The heat treatment of non-stretched glass at the same temperatures results in the decreasing of the plasmon peak amplitude and in its blue-shift.