<p>The addition of MgO is widely used to improve the high-temperature metallurgical performance of iron ore pellets, including vanadium–titanium magnetite pellets. However, the effects of MgO addition on the oxidation consolidation and low-temperature reduction disintegration behavior of vanadium–titanium magnetite pellets remain unclear. Therefore, magnesium-containing vanadium–titanium magnetite pellets were prepared to systematically investigate their oxidation and reduction behaviors, especially on the reduction disintegration mechanism. The pellets strength initially increased and then decreased as the addition of MgO increased. When the MgO addition increased from 0 to 2.0 wt.%, the compressive strength of roasted pellets rose from 2024 to 2560 N/pellet, and the low-temperature reduction disintegration index showed slight variation. The increase in MgO addition promoted the transformation of (Fe, Ti)₂O₃ to (Fe, Ti)₃O₄ especially when it was beyond 3.0 wt.%, accompanying larger unit-cell volume expansion and higher internal stresses. In the above MgO addition range, the reduction disintegration index RDI_{−3.15 mm} exceeded 28%, indicating a marked deterioration in reduction disintegration behavior of magnesium-containing vanadium–titanium magnetite pellets.</p>