High Entropy Materials (HEM) have emerged as one of the fastest growing research fields in the materials science and engineering. After its discovery in 2004, which originally focused on forming solid solutions based on equiatomic compositions of metallicalloys, the field has expanded to cover multitude of materials and affiliated phenomena. The great potential for unfolding the fundamental effects of mixing large number of components in high concentrations upon the evolution of microstructures and properties of materials and their speculated engineering applications have attracted the attention of both scientists and engineers equally. Some of the recent topics of discussion in the HEM community include multicomponent diffusion and phase equilibria; mechanical, magnetic and electrical properties of HEMs; HEM coatings; nanocrystalline HEMs; interstitial hardening of HEMs and many more. In order to take a stock of the advancements and progress in the science and applications of HEMs, IWHEM 2020 is planned at Indian Institute of Technology Kanpur (IITK). The intention of this workshop is to discuss the challenges and opportunities offered by the field with a special focus on the fundamental understanding of thermodynamics, phase transformations, possibility of phase predictions, multicomponent diffusion and their applications to design novel synthesis methods, microstructures and mechanical and functional properties in HEM. The deliberations will take place in the pristine and serene atmosphere of the green campus of IITK filled with academic flavour during March 7th and 8th, 2020. It is worth mentioning that IWHEM series of workshop is an Indian initiative. The previous two worshops were held at Chennai (2015) and Hyderabad (2017).