Then surrender, coward, and we’ll put you in a freakshow, just like they do with deformed animals.
Come on, let’s go at it, Macduff, and damn the first man who cries, 'Stop! Enough!'
In accordance with fate, Macbeth is convinced by Lady Macbeth to kill Duncan. Despite Lady Macbeth convincing Macbeth to kill him, he still chose to do that on his own free will. No one could have forced Macbeth to kill him but the witches and Lady Macbeth planted the idea in his head. He then did it out of his own free will.
Macbeth tries to cheat fate by killing Banquo. When the witches say that Banquo's children will become the kings. He doesn't fully succeed because when the murderers kill Banquo, his son Fleance runs away, thus fulfilling fate.
The last example of fate is how Macbeth cannot be destroyed by someone born of women. Because of this, Macbeth believes he invincible. Macduff is not born of women and is the one who shall kill Macbeth. Macbeth is then decapitated and his fate is fulfilled