Gunpowder said:Warforged can treat all death saving throws as a 10 so they never bleed out but can eventually get back up when they roll a 20 and spend a surge.
But anything else that grants a bonus to a saving throw also affects bleeding out.
Mort_Q said:They can take 10 or roll... not both. Rolling is a risk to them. If they want to take 10 they'll need to wait for someone to help them.
MM pg. 279 said:When you roll a death saving throw, you can take the better of your die roll or 10 as the result.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.