The tier one "Small Control Room" with two doors opposite each other, 8000 view range, and "Grit tolerance" shows a cost of 55 iron ore, however it adds 55 titanium ore cost to the ship instead.

I found this out when my redesign of the Boulder/"D19" suddenly cost titanium, and after some head scratching and trial and error that control room turned out to be the cause. I tried adding it to the Eagle as well to confirm. Now I don't know if it's supposed to cost 55 titanium and shows the wrong info, or cost 55 iron but instead cost 55 titanium (i suspect the latter), but the displayed cost and actual cost doesn't match.

EDIT:
This appears only to be the case when the control room is turned in the direction where the two doors are to the top left and top right, and the two yellow lines i assume are monitors are in the bottom right.
In other words, it only costs titanium instead of iron when rotated in a specific way.