Cell + Ionic relaxation with CHGNet; 0.03 eV/Å threshold; final energy = -99.5384 eV; energy change = -0.1090 eV; symmetry: P6_3/mmc → P6_3/mmc
TiFeSi C14 Laves phase discriminator: Ti on 4f, Fe on 6h, Si on 2a. P6_3/mmc (No. 194), c/a=1.630. Tests whether Fe-on-2d collapse is intrinsic or rescuable by Ti co-occupancy.