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This literature review indicates that the basic microstructure of Ti6Al4V is bimodal, consist-
ing of two phases, namely α + β, and it occurs after fabrication using conventional methods such
as casting, plastic forming or machining processes. The fabrication of components via an additive
manufacturing process significantly changes the microstructure and properties of Ti6Al4V. Due to the
rapid heat exchange during heat treatment, the bimodal microstructure transforms into a lamellar
microstructure, which consists of two phases: α′ + β. Despite the application of optimum printing
parameters, 3D printed products exhibit typical surface defects and discontinuities, and in turn, sur-
face finishing using shot peening is recommended. A literature review signalizes that shot peening
and electropolishing processes positively impact the corrosion behavior, the mechanical properties
and the condition of the surface layer of conventionally manufactured titanium alloy. On the other
hand, there is a lack of studies combining shot peening and electropolishing in one hybrid process
for additively manufactured titanium alloys, which could synthesize the benefits of both processes.
Therefore, this review paper clarifies the effects of shot peening and electropolishing treatment on the
properties of both additively and conventionally manufactured Ti6Al4V alloys and shows the effect
process on the microstructure and properties of Ti6Al4V titanium alloy.
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