The paper presents a study based on the experimental research on the surface quality of the medical implants used for the partial resurfacing of the femoral condylar surface of the knee obtained by single point incremental forming process. The present paper discusses the measuring of the roughness of parts obtained through the previously mentioned process and highlights the factors that influence it. The initial roughness of the punch, the punch diameter, and the friction coefficient between the punch and the blank were considered. Also, the mathematical models that define different roughness parameters were determined.

Ti6Al4V titanium alloy is considered a biocompatible material, suitable to be used for manufacturing medical devices, particularly cranioplasty plates. Several methods for processing titanium alloys are reported in the literature, each one presenting both advantages and drawbacks. A decision-making method based upon AHP (analytic hierarchy process) was used in this paper for choosing the most recommended manufacturing process among some alternatives. The result of AHP indicated that single-point incremental forming (SPIF) at room temperature could be considered the best approach when manufacturing medical devices. However, Ti6Al4V titanium alloy is known as a low-plasticity material when subjected to plastic deformation at room temperature, so special measures had to be taken. The experimental results of processing parts from Ti6Al4V titanium alloy by means of SPIF and technological aspects are considered.

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