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The hardness and elastic properties of 20PbO · xBi2O3 · (80 − x)B2O3 glasses with x = 20–60 were evaluated through usual Vickers indentation and nanoindentation tests. The glass transition temperature (Tg = 295–421°C), Vickers hardness (Hv = 2.9–4.5 GPa), true hardness (H = 1.5–3.8 GPa) and Young's modulus (E = 24.4–72.6 GPa) decreased monotonously with increasing Bi2O3 content. This compositional...