Effect of low TiO ₂ additions on the microstructure and mechanical properties of stir-cast Al–Zn composites

January 1, 2026RSC AdvancesOpen Access

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The aim is to examine how low additions of TiO2 affect the microstructure and mechanical properties of Al–Zn composites.
Conducted stir-casting of Al–Zn composites with varying levels of TiO2 (0.5 wt%).
Analyzed changes in grain structure and mechanical properties including hardness, impact strength, and tensile strength.
Measured defect rates in the composites, specifically void percentages.
0.5 wt% TiO2 reduced voids from 0.98% to 0.62%.
Hardness increased by 52% in TiO2 reinforced composites.
Impact strength improved by 32%, and tensile strength increased by 23% compared to unreinforced Al–Zn.

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Reveals that low TiO2 levels enhance mechanical strength in aluminum-zinc composites, indicating improved material performance.

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Shawon et al. (2026) studied this question.

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