A solid torsion sample made from non-age hardenable single-phase Al alloy AlMg3 is continuously deformed until failure. The low speed deformation with free ends is carried out at room temperature. For the first time, the dynamic in-situ development of the local texture and strain state within the sample are observed by means of a novel strain and texture scanning technique. The technique is based on the combination of a microfocussed high energy synchrotron beam, a conical slit system and a large area X-ray detector. The experimental results clearly show the deformation dependent evolution of axial forces (the so-called Swift effect). The texture development exhibits a change from the initial 111/100 fibre texture to the dominance of ideal torsion texture orientations.