Abundance differences between the two ionisation stages of iron, Fe I – Fe II (top panel), and titanium, Ti I – Ti II (bottom panel), in the investigated stars in Sculptor, Ursa Minor, Fornax, Sextans, Boötes I, UMa II, and Leo IV dSphs. For the MW halo stars only Ti I – Ti II is shown. Symbols as in Fig. 2. The open and filled symbols correspond to the LTE and NLTE line-formation scenario, respectively. Here, S_H = 0.5 for Fe i-ii and S_H = 1 for Ti i-ii.