Fords with the 5.4 and 4.6L with variable cam timing are well known for having a cold tick.
Indeed, Ford now recommends that if you don't like the tick, you should change from 5W20 to 10W40 weight oil.
I'd suggest changing your oil to a slightly higher value - if the tick goes away, it's really nothing to worry about it.
Injectors also tick. You'll also hear a tick if you have a cracked or broken exhaust manifold, and it goes away when then manifold heats up and seals again.
With all the rotary parts on an engine, without something more specific, it's hard to guess what it might be.