Chemical abundance ratios of wide binaries for individual and average α-elements (Mg, Si, and Ca), and Ti, together with field stars in the Milky Way bulge (Johnson et al. 2014), disk (Adibekyan et al. 2012; Bensby et al. 2014), and halo (Adibekyan et al. 2012; Roederer et al. 2014). We also plot wide binaries in the disk (magenta squares: Hawkins et al. 2020) and halo stars also associated with the Sequoia (brown and yellow stars: Stephens & Boesgaard 2002; Monty et al. 2020). The horizontal dashed line indicates the solar level. It is interesting that the WB2 pair and the Sequoia G2 stars are commonly depleted in α-elements compared to the general trend of field stars.