Cu-Nb tubes are one of the candidates for the manufacturing of accelerator units for a linear collider. In order to produce an accelerator unit by hydro-forming the Cu-Nb tube is the pre-product which should have homogeneous textures around the perimeter. The investigations were carried out on ring samples with a diameter of 130 mm and a width of 15 mm, which were cut from the tube material. Due to the high penetration depth of thermal neutrons the average texture of both phases (Cu 3mm thick and Nb 1mm thick) was measured. Local textures obtained at different ring positions indicate that the inhomogeneity hydro-forming process will lead to inhomogeneities. In order to get local textures around the perimeter of the Cu-Nb ring a Cd-slit for the incoming beam and a similar Cd-slit for the outgoing beam was used.