| Summary: | The mechanical and radiation shielding features were reported for a quaternary Na<sub>2</sub>O-CaO-SiO<sub>2</sub>-TiO<sub>2</sub> glass system used in radiation protection. The fundamentals of the Makishima–Mazinize model were applied to evaluate the elastic moduli of the glass samples. The elastic moduli, dissociation energy, and packing density increased as TiO<sub>2</sub> increased. The glasses’ dissociation energy increased from 62.82 to 65.33 kJ/cm<sup>3</sup>, while the packing factor slightly increased between 12.97 and 13.00 as the TiO<sub>2</sub> content increased. The MCNP-5 code was used to evaluate the gamma-ray shielding properties. The best linear attenuation coefficient was achieved for glass samples with a TiO<sub>2</sub> content of 9 mol%: the coefficient decreased from 5.20 to 0.14 cm<sup>−1</sup> as the photon energy increased from 0.015 to 15 MeV.
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