
JCDecaux purchased the assets in January, after Titan entered administration and chief executive Jon Slatkin failed in his attempt to secure a management buyout.
The addition of the Titan assets means JCDecaux controls approximately 29% of the outdoor market and, as such, the OFT asked interested parties to comment on the sale by 24 March.
Following a review of the evidence, the OFT has cleared the purchase of any competition issues.
Last week, JCDecaux reported worldwide revenues of £487.2m during the first quarter of 2010, up 14.7% when compared with £424.6m in Q1 2009.
In its results, JCDecaux said its UK street furniture division experienced a high single-digit organic revenue increase, reflecting an improvement in the ad market, and the purchase of the Titan point-of-sale assets.
JCDecaux said although the UK transport market recorded a revenue decrease, its own UK billboard revenue benefited from a significant rebound in the first quarter.