In order to realize the effective control of welding quality

the influence of the process parameters on the composite arc voltage in the new laser–plasma arc coaxial hybrid welding of titanium alloy was investigated. An arc electrical characteristic acquisition system was adopted to collect the arc electrical signals in the process of hybrid welding

and the multiple linear regression method was utilized to construct a regression model between the process parameters and the arc voltage

so as to deeply analyze the influence rules of hybrid welding process parameters

such as nozzle height

laser power

and plasma current

on the arc voltage. The results showed that under the conditions set in this experiment

the plasma voltage in the hybrid welding fluctuated dynamically within the range of 18–36 V. Moreover

as the nozzle height

current value

and laser power gradually increased

the arc voltage showed an upward trend. Through the quantitative evaluation of the regression model

the influence of the nozzle height on the arc voltage was the most prominent

followed by the plasma current

and the laser power had the least influence. By observing the changes in the arc morphology

the accuracy of the regression model in judging the weights of the influencing factors was verified. This provided experimental evidence and theoretical basis for further optimizing the welding process.