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The additive manufacturing method has been developed and continues to be investigated as an alternative to conventional manufacturing methods. This method is based on part production from 3D computer aided software. Additive manufacturing, also called a three-dimensional (3D) printing technology, is divided into two sections as powder and wire according to the type of used material. Powder-based system, the powder accumulated on the metal substrate; parts are produced by melting or sintering them with electron, laser, or arc heat source. In wirebased system, the method of melting and depositing the wire material using MIG / MAG, TIG or plasma welding systems is used. In this study, Wire arc additive manufacturing (WAAM) method is explained and classified according to the type of heat source. This method has become an important research topic for the industry with its advantages, such as reductions in production time, production close to net shape and cheapness of wire raw material compared to powder. In this study, research about stainless steel, aluminium, nickel super alloys, magnesium, and Ti6Al4V alloys which are used commercially in industry were reviewed. Mechanical properties were compared with traditional manufacturing methods such as casting and forging. It has been noted that the cooling conditions for steel alloys are important for mechanical properties obtained in the productions. It has been determined for aluminium alloys that the processes performed during or after production (rolling, forging, etc.) positively affect mechanical properties. In addition, it has been seen that the desired mechanical properties can be achieved for Ti6Al4V alloys. [ABSTRACT FROM AUTHOR]