Bradley and Noah Pearton, both of Bourne Vale in Hayes, were each charged with various offences on Wednesday (January 8).
Bradley, 22, is accused of threatening the woman with a 22-inch Rambo style knife, assaulting her, strangling her, threatening to kill her and breaching a court order banning him from carrying knives.
Noah, 18, is accused of threatening to share photos of videos of the woman in an intimate state, stalking her, assaulting her and strangling her.
The offences are all alleged to have taken place on January 3.
The brothers will appear at Bromley Magistrates’ Court on Friday (January 10).