How to fabricate pipe mitre bends?

depends on which kind of pipe it is. copper is normally bend using a pibe bender, you can get it at most hardware stores.. if its a steel pipe for water and so on, you can fill it with sand, and...

Depends if the copper tubing is annealed or drawn type as not all copper tubing if bendable

i oso dunno

Using various mathematical formulas such as a 45 degree offset would be 1.4142. Then there is 90 DEG, 60 Deg, 45 Deg, 22.5 Deg 11 1/4 DEG. 1/4 bend 1/8 Bend 1/16 Bend 1/32 Bend and then once yo know...

wrought pipe bends means straight pipe bend using rotary draw pipe bender. or pipe bend by any method