TITANS in the Kiel diagram (left panel) and HR diagram (middle and right panels). Surface gravities of TITANS II giants (log ɡ < 3.5 dex) are listed in Table 2, while those of TITANS I dwarfs come from Giribaldi et al. (2021). CEMP stars are marked with a cross symbol. The Kiel diagram displays Yonsey-Yale isochrones (Kim et al. 2002; Yi et al. 2003) as reference. HR diagrams display STAREVOL evolutionary tracks (Siess & Arnould 2008) for [Fe/H] = −2 dex and different masses, as labelled (middle panel), and for a mass of ℳ = 0.9 ℳ_⊙ and various metallicity values, as labelled (right panel). The track representing CEMP stars (blue line) has an abundance ratio of C/O = 2 (details are given in Karinkuzhi et al. 2021). Tracks were constrained to maximum ages lower than the age of the Universe, 13.8 Gyr. Candidates that have started the horizontal branch are tagged by their identifiers in Table 2.