We recently reported that ${\mathrm{Ti}}^{3+}$ -doped low-silica calcium aluminosilicate glass presents long luminescence lifetime $\left(170\mu \mathrm{s}\right)$ and broad emission band $\left(190\mathrm{nm}\right)$ shifted toward the visible region when compared with those from ${\mathrm{Ti}}^{3+}$ :sapphire single crystal and ${\mathrm{Ti}}^{3+}$ -doped glasses [ Phys. Rev. Lett. 100, 027402 (2008) ]. Here we demonstrate that this glass also shows high values of both gain cross section $(\sim 4.7\times {10}^{-19}{\mathrm{cm}}^2)$ and luminescence quantum efficiency $(\sim 70\mathrm{\%})$ . By comparing these values with those for ${\mathrm{Ti}}^{3+}$ :sapphire crystal, we can conclude that the studied ${\mathrm{Ti}}^{3+}$ -doped glass is a promising system for tunable solid-state lasers.