Owing to the widespread applications of the additive manufacturing (AM) methods for production of metallic parts with a complex geometry, feasible utilization of these methods for mass production in various industries is quite vital. Moreover, due to the existence of defects and anomalies in the powder bed fusion (PBF) and directed energy deposition (DED) methods, the post-processing of fabricated parts might be necessary to improve properties, which is costly and time consuming. A fruitful approach to overcome these shortcomings is the integration of the hybrid manufacturing concept with conventional AM. Accordingly, both mixed and assisted hybrid AM processes are frequently used for fabrication of the Inconel 718 (IN718) nickel-based superalloy parts. As reviewed in this chapter, the enhancement of surface roughness, improvement of mechanical properties, increase in hardness and wear resistance, grain and microstructural refinement, and reducing the surface tensile residual stresses for improving the fatigue life can be achieved by hybrid AM processes assisted by machining, rolling, and peening. At the end of chapter, some distinct suggestions for future works are introduced, including the application of friction stir processing for inducing dynamic recrystallization (DRX), which refines the microstructure toward improving the mechanical properties.