Here's why:
* The Knights Templar were dissolved in 1312. Joan of Arc was born in 1412, over a century after the Templars were disbanded.
* The Knights Templar were a military order of men. Joan of Arc was a woman.
* The Knights Templar were primarily involved in military campaigns and protecting pilgrims. Joan of Arc's primary mission was to lead the French army against the English in the Hundred Years' War.
While Joan of Arc was a deeply devout Christian who believed she was divinely inspired, she was not affiliated with any particular religious order. She was a peasant girl who rose to become a military leader and a symbol of French patriotism.