Cell + Ionic relaxation with Orb v3 conservative inf MPA; 0.03 eV/Å threshold; final energy = -88.5858 eV; energy change = -80.9152 eV; symmetry: P6_3/mmc → P3
TiCo2 C14 Laves phase discriminator: Ti on 4f, Co on 2d (fixed) and 6h (free x). P6₃/mmc (No. 194), c/a=1.630. Tests whether Co-on-2d (fully fixed Wyckoff) survives MLIP relaxation — discriminates geometric vs. electronic mechanism for symmetry erasure.