Titanium was written by co-written by David Guetta Titanium was written by co-written by David Guetta Titanium was written by co-written by David Guetta Titanium was written by co-written by David Guetta Titanium was written by co-written by David Guetta Titanium was written by co-written by David Guetta Titanium was written by co-written by David Guetta Titanium was written by co-written by David Guetta Titanium was written by co-written by David Guetta