There is no designated term for a male wolf. In terms of canines and breeding, a male can be called a sire while a female is called a bitch.
It's a common misconception that the term "alpha" signifies masculinity. In a wolf pack, this designation merely means that the wolf is the leader. In a pack dynamic, the alpha position is occupied by a pair of wolves, male and female. Furthermore, males and females occupy similar positions further down the latter of the pack. Betas are the middle class of the hierarchy that may eventually rise to an alpha position. Omegas are considered the lowest of the group.