The in-form chaser used his superior finishing power to march to a comfortable win by more than three lengths in 37.26.
After coming through the early scramble relatively unscathed Texan Star landed midfield as they rounded out of the first corner.
Texan Star found some clear room to move in the back straight and he pushed forward to gobble up the lead of kennelmate Mandy Charm.
By the time they turned for home Texan Star had established an unassailable advantage.
The feature races continue at Mandurah this Friday night with the final of “The Sandgroper” over 490m.
West On Babe qualified as the fastest runner for the trophy decider following an eye-catching heat win.
The talented red fawn recorded her fourth win from her past six starts when she clocked 27.37 to brain her rivals by ten lengths.