Centre-back Collins has worn the armband during Pools' pre-season programme, with club captain Humphreys sidelined by an Achilles injury.
Turner admits it was an easy choice to stick with Collins at stadium:mk.
He told Pools Player: "Sam is very experienced and is the clear choice at the moment.
"I've had certain things in my mind and thoughts about it but when you look at the experience factor then Sam has that.
"I know the other players do look up to him and it's vital to have that in a captain."