Ratiometric mechanoluminescence (RML) improves accuracy and stability over absolute emission intensity by encoding mechanical information into the intensity ratio of multiple emission channels. However, existing RML approaches mainly rely on multi‐ion doping or multi‐component systems with limited controllability, spectral overlap, and complex energy transfer. Here, we report a single‐ion Tm³⁺ activated RML material, YVO₄:Tm³⁺, showing sharp dual emissions in the visible and near‐infrared (NIR) under mechanical stress. Two well‐resolved peaks at 474 nm and 800 nm arise from distinct intra‐4f transitions of Tm³⁺ activators, with a large spectral separation of 326 nm for high‐fidelity discrimination. Mechanistic studies indicate that ratiometric behavior originates from stress‐modulated energy transfer between the YVO₄ lattice and Tm³⁺ activators. Under low stress, energy transfer from the ³T₁ host level …