The effects that accompany mechanical deformations (intensive slip, crack, and break formation) of crystalline media are considered. Using the concept of parametric resonance in deuterium nuclear layers, the mechanism is shown whereby processes characterized by energies ≤1 eV can lead to effects that are characterized by energies ≥100 eV. These processes take place in a zone of concentration of shearing stress at the moment of the formation of a tangential break of the media movement. The electron-ion interactions provide an added source of ion heating. Electrons are heated in the oscillation force field in the same manner as ions. The effect can be outlined as the formation of the plasmalike state on the crack boundary under mechanical fracture of crystals. This can be a possible cause of deuteron-proton fusion at room temperature in crystalline media.