The development of the texture and deformation structure in AA 1100 sheet, severely deformed to true strains of similar to10, by accumulative roll bonding (ARB), has been studied by high resolution EBSD and bulk texture analysis. It has been found that even at very high strains, ultra-fine grains are not produced homogeneously through the sheet thickness. A strong texture developed during ARB, which resulted from the weakening of the Brass {011)<112> and S {123)<634> rolling components in favour of a very strong Cu {112}<111> and Shear texture {001}<110>. This texture develops because the surface shear texture rotates to Cu when moved to the sheet centre during each bonding cycle. It is thought that the development of a strong texture prevents full grain refinement to the submicron scale, despite the extremely high plastic strains achieved.