The polarization effects in W-boson pair production in pp-bar collisions and the possibility of determining on their basis the parameters of three-boson vertices are studied. It is shown that the dependence of asymmetry on these parameters in some cases will allow to distinguish between the standard model of electroweak interactions and constituent models. The values of the asymmetries investigated allow their experimental measurement already on operating hadron colliders. 16 refs.; 4 figs.; 2 tabs.