Abundances of Fe I and Ti I as function of T_eff. The open symbols represent the optical measurements, while the red symbols indicate the NIR measurements. The diamond indicates TYC 1991-1235-1, the star symbol represents HIP 61205, and the pentagon denotes HD 167389, for which we have both optical and NIR measurements. The Pearson correlation coefficient of the trend in the top panel is r = 0.67, which is not significant at p < 0.1. For Ti the Pearson correlation coefficient is r = −0.03, which is not significant at p < 0.1.