Carter, Are you looking to do specific crosses or a general cross? Keep in mind not all named Ti are capable of producing seed. Some are good as a male pollen donor but will not set fruit themselves.
If you want to do the easy general cross all you need to do is get a small paint brush and move the pollen from male flowers to a female flower.
If you wish to do a specific cross decide who will be the seed producing plant and remove the male flowers as soon as the flowers open daily. The flowers will continue to open on the flower stalk for a week or so and you will have to continue the daily removal of the male flower parts (AM hours are best). The female flower is usually ready to accept pollen (will be wet on the end) the 2ed to the 4th day (depending on temps) after opening. Take the paint brush and remove pollen from male flowers of your donor plant to the female flower of your selected and prepared female. Cover the flower stalk with a lunch size paper bag to stop any cross pollination from other Ti that may be in flower at the time.
If you have any other questions feel free to ask.