The inhomogeneous deformation which occurs in the vicinity of large (greater than or equal to2mum) secondphase constituent particles in AA1050 (Al-0.4wt%Fe-0.25wt%Si) and Al-2wt%Cu alloys, during cold rolling has been investigated using High Resolution Electron Backscattered Diffraction. The maximum misorientation angle, the axis of misorientation and the size of the deformation zone have been measured as a function of strain, grain orientation and particle size and shape. It was found that the maximum misorientation angle within the deformation zone increased with strain, and that the size of the deformation zone remained constant at approximately one particle diameter. It was also found that the misorientation axis tended towards alignment with the transverse direction as strain increases. Crystal plasticity finite element modelling has demonstrated misoriented bands adjacent to the particles of similar geometry, although their shapes are found to be highly dependent on the starting orientation of the crystal.