The material studied in this paper is an aluminium alloy used in the automotive industry for inner panels. It contains intermetallic particles and voids, both formed during solidification. The industrial process used to transform aluminium slabs into plates is hot rolling. During this stage, the structure of the material undergoes an important evolution under the applied stress. One observes that particles are broken and randomly distributed, and the distributions of the size and shape of the particles and voids change (Baldacci, 2003).