This title needs to be more specific, as it appears in a list of all the examples
 -- as in : http://scitools.org.uk/iris/docs/latest/examples/index.html
I have found it useful to adopt a style "describing the technique", in a form like "XXXing a YYY ZZZ"
(e.g. "Applying a filter to a time-series", "Deriving Exner Pressure and Air Temperature", "Calculating a custom statistic")