High-temperature extruded polycrystalline NiAl with different initial textures has been deformed in torsion at 1000 K in a Paterson-type rock deformation machine under 400 MPa Argon confining pressure. The maximum strain rate was about 10(-4)s(-1), the maximum shear strain about 3. To study the texture development in the cylindrical samples from the centre to the outer mantle, i.e. with increasing strain, high-energy synchrotron radiation has been used. The texture observed for samples with an initial <111> fibre parallel to the torsion axis is characterized by an alignment of <100> and {110} parallel to the shear direction and shear plane, respectively. The texture development of the sample with an initial orthorhombic texture and <100> aligned parallel to the torsion axis shows the same tendency. The texture evolution simulated with the full constraints Taylor theory is in qualitative agreement with experiment.