Fused filament fabrication (FFF) is a 3D printing technology that uses polymer-based materials to create specialized and functional parts for the medical and engineering sectors. Gaining insight into the effects of various processing settings, composite materials, internal geometries, and lattices on mechanical and tribological behavior will improve comprehension of the features of FFF final products, but it turns out that getting this information is difficult. Because of this, it is important to look at the existing study and literature on how it can be used in real life, as this will aid in understanding the findings of these studies as well as aid in identifying important traits, crucial processing factors, and constraints. In light of this, a methodical and classification-based examination of the literature was done on the way of 3D-printed plastics behave mechanically and tribologically.