The effect of starting grain size on the formation of microstructure and texture in heavily deformed equiatomic CoCrFeMnNi high entropy alloy (HEA) was investigated. For this purpose two alloys with average grain size ∼7 μm (fine grained starting material or FGSM) and 200 μm (coarse grained starting material or CGSM) were cold-rolled to 90% and 95% reduction in thickness and isochronally annealed for one hour at temperatures ranging from 700 °C to 1200 °C. Development of strong brass type texture, typical of low stacking fault energy (SFE) materials was noticed in both FGSM and CGSM. Near ultrafine microstructure formation was observed after annealing at 700 °C but extensive grain growth was observed only after annealing at 1200 °C. The FGSM showed finer grain size as compared to CGSM after heavy deformation and annealing. The annealing twin boundary fraction increased with increasing annealed grain size. The annealing textures of both FGSM and CGSM did not show strong dominance of the {236<385> or {113}<332> components unlike low SFE brass. Furthermore, the volume fractions of different annealing texture components of the HEA were not significantly affected by starting grain size or annealing temperature in stark contrast to low SFE brass. These differences could be explained on the basis of homogenously deformed matrix and sluggish diffusion in HEA which greatly reduced the preferential nucleation and growth of components, respectively. © 2015 Published by Elsevier B.V. All rights reserved.}, author_keywords={Grain boundaries; Metals and alloys; Microstructure; Scanning electron microscopy; Texture; X-ray diffraction}, keywords={Alloys; Annealing; Brass; Cold rolling; Entropy; Grain boundaries; Grain size and shape; Metal cladding; Metallurgy; Microstructural evolution; Microstructure; Scanning electron microscopy; Stainless steel; Textures; X ray diffraction, Annealing temperatures; Annealing twin boundary; High entropy alloys; Low stacking fault energies; Metals and alloys; Nucleation and growth; Thermo-mechanical processing; Ultra-fine microstructures, Grain growth}, correspondence_address1={Bhattacharjee, P.P.; Department of Materials Science and Engineering, Indian Institute of Technology Hyderabad, Yeddumailaram, Ordnance Factory Estate, AP, India}, publisher={Elsevier Ltd}, issn={09258388}, coden={JALCE}, language={English}, abbrev_source_title={J Alloys Compd}, document_type={Article}, source={Scopus},