OTTAWA, April 25 (Reuters) - The sanctions exemption that Canada granted Airbus to allow it to use Russian titanium in its manufacturing is available only for a limited time, a Canadian source with direct knowledge of the matter said on Thursday.

The exemptions that Canada has issued so far apply only to the aerospace sector, including the military sector, said the source, who requested anonymity given the extreme sensitivity of the matter. (Reporting by David Ljunggren)