What is the question?
Which materials?
I presume that you have a base design or a sample that you have examined.
If not then start there.
Come back when you have a specific question.
Hi..thank you for your response..
Yes i have 3D design and i wanted to 3D print the motor to test so i need advice on right magnet, rotor, stator and housing materials...
These are made of special materials. Catch hold of an existing drawing, check the materials used there, then post specific query regarding any such material.