Accretion parameters as a function of stellar mass for ETGs in TNG100, and separately for FRs and SRs: total in-situ mass fraction (top left), fraction of new in-situ stars since z = 1 (top right), mean accreted gas fraction (bottom left), and redshift of the last major merger (bottom right). The solid lines show the median profiles for the whole sample (black) and for FRs (blue) and SRs (red). The shaded regions show the quartiles of the distributions. FRs and SRs follow similar trends with M_*, but at fixed M_*, SRs have on average more accreted stars, they accreted less gas, and they had more recent major mergers.