In the present paper rheological behavior of the Oxide Aluminum-Polymer Composite Sliding Bearing was examined. The requirements to the rheological models were formulated regarding adequate strain-strain state of the bearing. Rheological models of the composite sliding bearing have been proposed and were confirmed by in-situ experiments using principal Hertzian theory as the background. Load rating tests have revealed ultimate stresses of the sliding bearing and the strain-deformation modes of the sliding bearing ’ elements. The Oxide Aluminum-Polymer Composite Sliding Bearing was presented in the form of the complex elastic-tenacious-plastic rheological model. The metal-polymer layer was modeled by the rheological model consisted from two elastic elements and one tenacious element. As a prototype of the model, we studied a model comprising the Maxwells’ model and an elastic element. In general, a rheological equation depends on a level and form of strain applied. Analysis of the models and experimental results revealed better understanding of nanocomposite fracture and degradation mechanics. The nanocomposite exhibits linear relation of strain curve, whereas unloaded composite shows retardation of deformations (elastic return). The relations of experimental data and calculated data revealed very close agreement of developed rheological model and real mechanical behavior of the nanocomposite.