The Guinean made his first appearance of the season as an 81st minute substitute for Jermain Defoe at Old Trafford on Saturday, and hopes to prove that he can still make a contribution to the Upton Park cause.
It was only his seventh game in a West Ham shirt since joining from Liverpool for £1.7m a year ago, and he now hopes that the injury problems which have contributed to restricting his appearances are over.
"It has been a long time since I played but I'm happy - my season started on Saturday," he says.
"I had a big problem with my knee but now I am training and my fitness is okay.
"The last five months have been frustrating."
But 29-year-old Titi, who scored for the reserves last week, says everything is improving now and adds: "I want to prove that I am a good player. Before I had a big problem adapting but now my English is better, I have made my comeback, and I am ready to play for West Ham.
"The competition is no problem, but the injury was; the gaffer takes the decision about which two strikers play."
Of the win over Manchester United, he enthuses: "It was a good performance and a good result against a good side - we congratulate the gaffer for the tactics and the team."