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We present a multi-scale scratch resistance analysis of thin titanium layer with thickness varying between 0.5 and 1 m, deposited on two biomedical polymeric substrates (UHMWPE). Using different experimental set-ups with specific tip radii, we have performed scratch experiments at various testing conditions. First, nano scratch tests have been performed with a spherical indenteur (tip radius R = 22 m) with increasing progressively the normal applied load between 1 and 100 mN. Then,doi:10.1016/j.proeng.2011.04.472 fatcat:v5egpxqgbngxrh735dybwykszi