In a general way, because he had done good military service to the kingdom. In this respect, he might have given the title equally to Banquo. The fact that Macbeth was of royal blood and a close relative to the king was probably a factor. Duncan was an incurable nepotist as witness his making the feckless and militarily useless Malcolm the Prince of Cumberland.
Do not make the mistake of thinking that it was a reward for capturing the traitor Cawdor. Macbeth didn't do that, because if he had, he would never have said shortly afterwards "The Thane of Cawdor lives, a prosperous gentleman! Why do you dress me in borrowed robes?" If he had said that after capturing him Ross would have replied "Because you just finished capturing him on the battlefield you stupid twit!"
The Thane of Cawdor is hanged by King Duncan, and the title is given to Macbeth.
He gives him the title thane of Cawdor since the other Cawdor was a traitor
he gave the title to Macbeth because the Thane of Cawdor committed treason and was executed for it.
The Thane of Cawdor is going to be executed for treason as he betrayed King Duncan's army. Macbeth will be granted the title of Thane of Cawdor in his place.
No, Thane of Cawdor is not pardoned by King Duncan. Instead, King Duncan orders Thane of Cawdor to be executed for betraying him and supporting the Norwegian king. Macbeth is then named the new Thane of Cawdor for his bravery in battle.
The New Thane Of Cawdor
The Thane of Cawdor in Shakespeare's play "Macbeth" was a traitor who was executed for treason. King Duncan then gives Macbeth the title of Thane of Cawdor as a reward for his bravery in battle.
In Act 1, Scene 3 of Shakespeare's "Macbeth," King Duncan awards Macbeth the title of Thane of Cawdor for his bravery in battle against the traitorous forces. This title is given to Macbeth to honor his loyalty and valor on the battlefield.
Some people might think that Duncan gives this title to Macbeth because Macbeth was instrumental in capturing the traitor Thane of Cawdor. But this is wrong. The Thane of Ross brings the news to Duncan of Cawdor's treachery but does not name Macbeth as the man that captures him. Ross is then told to find Macbeth and tell him that he is now the Thane of Cawdor. When Ross tells him this, Macbeth is astonished: he says "The thane of Cawdor lives--a prosperous gentleman! Why do you dress me in borrowed robes?" He would not have been astonished had he been the man to capture Cawdor. What is more, Ross is not surprised that he is astonished, because Ross knows that Macbeth has not yet heard of Cawdor's treachery. It is possible that Duncan misunderstood Ross's report and believed that Macbeth could simultaneously be in Forres (in northern Scotland) and Fife (in southern Scotland) fighting two different battles at the same time. If he was that much of a dimwit about the geography of the country he was supposed to be king of, then he might have rewarded Macbeth for something he did not do. It is far more likely that Macbeth receives the title either because Duncan wants to reward the brave and victorious Macbeth who defeated Macdonweald, or that his choice of Macbeth as the recipient is entirely arbitrary.
The title character, Macbeth, Thane of Cawdor.
Duncan gives him the title. Ross delivers the news to Macbeth.
Macbeth becomes Thane of Cawdor in Act 1, Scene 3 of the play "Macbeth" after the previous Thane of Cawdor is executed for treason. King Duncan orders the title to be transferred to Macbeth as a reward for his bravery and loyalty in battle.