Most lenders will allow you to split your loan, so you can have a portion of your loan fixed and a portion variable. This is a good idea if you have a large owner occupier home loan and know you will not be selling the property for a year or so.
Be aware however that your property is security for both portions of the loan and if you decide to sell or refinance prior to the fixed portion term being finished, you will be up for large penalties and fees; so only fix a portion or full amount for the years you are sure you are going to keep a property.
View example sheet (pdf, 1.6MB).