"Listen here. I have half a dozen blades to finish tempering and two more sets of plate armor to finish adjusting before the morning, and you think I have time to work on an unknown sword with an unknown alloy for someone that doesn't even know my prices? You may be a Titan, but you're still mortal just like the rest of us. You can wait your damn turn."
Blacksmith Tony Stark is the best in the business, and he doesn't take well to being talked down to. When what should have been a single job for a passing Titan becomes something more, his whole life gets turned upside down.
Stark probably didn't like Steve, either. They'd gotten off on the wrong foot, and that was putting it mildly.
And having to pretend to be a civilian Stark was dating, as cover for trying to save Stark's life while Iron Man was busy with a SHIELD mission, obviously wasn't going to help.
