Help with parsing information into the file name

Using this:

$site = Get-SPSite "http://contoso.comsites/Todd"

I am able to get this:

Title                                                                                                      

-----                                                                                                      

Todd       

I want to just take the "Todd"  and use it in the filename when outputting to CSV.

This is my script:

 #Add the SharePoint Powershell SnapIn

 Add-PSSnapin microsoft.sharepoint.powershell -EA 0 

 #Edit the URL below for the specific site collection you wish to extract alerts from

 $site = Get-SPSite "contoso.rjf.com/.../Todd"

 $TitleString = Get-SPSite $site | Get-SPWeb -Limit All | Select Title 

 $alertResultsCollection = @()   

 foreach ($web in $site.AllWebs) {     

 foreach ($alert in $web.Alerts){   

 $alertURL = $web.URL + "/" + $alert.ListUrl   

 $alertResult = New-Object PSObject   

 $alertResult | Add-Member -type NoteProperty -name "List URL"        -value $alertURL  

 $alertResult | Add-Member -type NoteProperty -name "Alert Title"        -value $alert.Title 

 $alertResult | Add-Member -type NoteProperty -name "Alert Type"       -value $alert.AlertType 

 $alertResult | Add-Member -type NoteProperty -name "Subscribed User"       -value $alert.User  

 $alertResultsCollection += $alertResult  

  }  

   } 

   $site.Dispose()  

   $alertResultsCollection  

$Path = "F:\"

$Prefix = $TitleString

$Suffix = "_SiteAlerts"

$FileExt = ".csv"

 ## Export to CSV  

 $alertResultsCollection | Export-CSV ($path + $Prefix + $Suffix + $FileExt) 

What this does is give me a filename as "@{Title=Todd}_SiteAlerts.csv"

How do I get it to just give me Todd_SiteAlerts.csv?
PS.....not a big fan of  the $path + $Prefix + $Suffx + $FileExt either.