To further improve the quantitative analysis accuracy of one-point calibration laser-induced breakdown spectroscopy (OPC-LIBS), the OPC-LIBS based on Saha-Boltzmann plot and self-absorption correction was proposed. Ti, V and Al in two titanium alloy samples were quantified using the method, and the quantitative results were compared with those of OPC-LIBS based on Boltzmann plot, OPC-LIBS based on Saha-Boltzmann plot, and OPC-LIBS based on Boltzmann plot and self-absorption correction. The results show that the proposed method can obtain the smallest quantitative error among the four methods, with mean relative errors (MREs) of 4.11% and 3.99% for the three elements in two titanium alloy samples, respectively, indicating that the proposed method can effectively improve the quantitative analysis accuracy of OPC-LIBS.