As the technology is improved there are number of techniques developed to tailor the properties of functionally graded material (FGM). The FGM materials are obtained by various process. Consequently the few FGM materials are obtained naturally such as oyster, pearl, bamboo and so on. Additive manufacturing (AM), is known as 3D printing, which is a net shaped manufacturing process that is employed to manufacture complex 3D objects devoid of needing tools, molds or the require of assembling and joining. Currently, commercially accessible AM technologies mostly uses homogeneous compositions till now. I.e. a modest geometrical description, also the usage of single-material FGAM through the complete component, while contrasting to a multi-material FGAM along with heterogeneous structures. As the materials plays a significant role in the industrial production. The present study reviews on the characteristics and mechanical behaviour of FGMs prepared by Additive Manufacturing. FGMs are used in various fields. The utilisation of FGM are based on their mechanical properties. The present study has reviewed past 30 years of literatures regarding FGM and additive manufacturing. The present study recommends the future researchers to analyse impact of artificial intelligence and machine learning techniques in making the industries for obtaining optimal processing conditions for different gradient systems.