Google uses your Title tags for exact match checking...They are important.
Your Keyword should be in the Title tag at least twice...You will get penalized for keyword stuffing in your title so for example if your keyword is Steam Iron. you would be over optimising if your title read "steam iron world,steam iron reviews,steam iron deals,steam iron parts,steam irons" but you can subtly produce something that reads like "Steam iron world the nets best steam iron reviews" drop your keyword in twice. You have 60 characters available in your Title tag. Any more than that and it will cut your tag mid word and you get .......... keep it under sixty...Keyword mentioned twice.