AA1100 sheet was severely deformed to true strains of similar to10, by accumulative roll bonding (ARB). High resolution EBSD and bulk texture analysis has been used to study the development of the texture and deformation structure. Even at very high strains it has been found that ultra-fine grains were 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, despite the extremely high plastic strains achieved, the development of a strong texture prevents full grain refinement to the submicron scale.