The characteristics of a dual-wavelength injection-locked pulsed laser are systematically studied. A simple and effective model is proposed to quantitatively study this type of laser system. It is shown that the model precisely predicts the performance of such a system over a wide spectral region and a full dynamic range. Furthermore, the results confirm the accuracy of the assumption regarding the homogeneous broadening in Ti:sapphire lasers, and also prove that competition between the two wavelength components does not induce instability.