[en] Numerical simulation of current instability development and saturation in a plasma with two ion species under the relative motion of ion components transverse to the strong magnetic field are discussed. It is shown that saturation of ion-ion current instability is of strong turbulent nature. This fact is based on the generation in configuration space of non-stationary density holes (cavitons) and regular structures (vortexies) in space phase. Resonant interaction of ions with plasma waves trapped into the cavity leads to the destruction of regular structures and to the stochastic (turbulent) plasma heating. Particle simulation of two-ion hybrid cyclotron resonance heating of a magnetized hydrogen plasma with deuteron minority of FMSW launched from the low magnetic field side is presented. Depending on the minority concentration, partial transmission and partial reflection of the incoming waves off the two-ion hybrid resonance layer occur, in contrast to the mode conversion mainly taking place during incidence from the high field side. Preferential minority heating is observed, as the minority cyclotron resonance is close to the two-ion hybrid resonance layer. (author). 21 refs, figs