How to wean from breastfeeding?

For starters my oldest twin has his top and bottom teeth, he still nurses but it’s painful each time. He just recently turned one, so i have started the transition off the boob but he is not happy about it. When he does get the boob he is so aggressive, which I can understand… My question for yall is how do I wean wean him. His twin is already weaned off by his own doing, his older 2 brother weaned themselves off too so this is my first time weaning a baby!