Good news everyone! I finally have a title for my novel (the noir novel completed in October). After years of referring to it by its working title "Noir" it now has a real title: Breaking Point. It's starting to feel more legit now.
A massive "thank you" to Nikki for suggesting the title, and to Sarah for encouraging me to not go with a cheesy, cliched, pulpy title like Murder in Manhattan or Death of the Black Widow or some such piffle.