[en] Epitaxial YBa₂Cu₃O_7-δ (013) films have been grown by pulsed laser deposition onto exact and vicinal (011) SrTiO₃ substrates. X-ray diffraction measurements showed that the films contained two mirror-related orientations when grown on exact (011) surfaces, but that a strong preference for only one of the two (013) orientations developed when the substrate surface was tilted by about 2 deg. toward the [011] SrTiO₃ direction. The inclination removed the two-fold symmetry of the surface to induce this preference, resulting in a film with (013) film parallel (011) substrate and [100] film parallel [100] substrate. Films with a single (013) orientation may offer some distinct practical advantages over other monocrystalline film orientations. (author)