Sentence:  The literature claims of <WSD>titanization</WSD> at 370 °C (Whittington and Anderson 1991) and of dealumination of H-[Al]-MFI followed by <WSD>titanization</WSD> at 400 or 500 °C (Kraushaar and van Hooff 1988) should perhaps be restudied as the observed catalytic activity may be due to outer surface titanium. 
Meaning of the word marked with <WSD> tags:  The process of coating with titanium.