Absolute color-magnitude diagram of TWA-a (red) and TWA-b (blue) members. The best-fit Parsec isochrones for each cluster, 9 and 6 Myr, are overplotted. The open squares indicate the spectroscopic binaries identified in this work (see Appendix A). Only stars with M_G < 10 mag were used for the isochrone fit (black horizontal lines). The isochrone fit was done on the CMDs using the BP-RP color (upper panels). The CMDs showing the G-RP color (lower panels) are included for completeness.