Calculated lattice parameters, formation energies and binding energies of 2 × 3 × 1 supercell of monolayer TiS₃, its few defected forms and Li and Na decorated TiS₃.

	a/b (Å)	E f (eV)	E b (eV)
Pristine TiS3	9.858/10.176	—	—
One S vacancy	10.379/10.699	3.87	—
Two S vacancies	10.128/10.695	2.70	—
Li decorated TiS3	10.352/10.453	—	1.12
Na decorated TiS3	10.275/10.529	—	0.73