There are several studies regarding the miscibility of polymethylmethacrylate (PMMA) and polyvinylidene fluoride (PVDF) blends in the molten state along with the rheological properties; however, there is a lack of information regarding the glassy state. The mechanical and wear properties of this system were investigated using both steady and dynamic tests. The results do not follow a simple additive rule of mixtures, but they can be readily explained by the phase morphology of the system. The system is semi-compatible with both an amorphous domain and a crystalline domain. The results for increasing PMMA concentration are : glass transition temperature, T-g (-34-130 degrees C); storage modulus, E＇ (1.1-2.6 GPa); flexural strength, sigma(0)(75-96 MPa); compressive strength, sigma(c)(60-120 MPa); and relative wear rate, R-A (0.05-1.8 mu m/rev). The amorphous blend had a saturation limit of about 40 wt% PVDF.