you can use title : 'My Title : {id} , My Age : {age}'
It will concatenate .
In the index.html you have to put
<script src="resources_path/sap-ui-core.js" id="sap-ui-bootstrap"
data-sap-ui-libs="sap.m"
data-sap-ui-theme="sap_bluecrystal"
data-sap-ui-xx-bindingSyntax="complex">
</script>